-
Doctor Who: 12 Doctors 12 Stories
- Narrated by: Charlie Higson, Frazer Hines, Ian Hanmore, Malorie Blackman, Marcus Sedgwick, Nicholas Briggs, Nicholas Pegg, Peter Kenny
- Length: 13 hrs and 2 mins
Add to Cart failed.
Add to Wish List failed.
Remove from wishlist failed.
Adding to library failed
Follow podcast failed
Unfollow podcast failed
Buy for $26.17
No default payment method selected.
We are sorry. We are not allowed to sell this product with the selected payment method
Listeners also enjoyed...
-
Doctor Who: Tales of Terror
- By: Jacqueline Rayner, Mike Tucker, Paul Magrs, and others
- Narrated by: Sophie Aldred, Rachael Stirling, Adjoa Andoh, and others
- Length: 7 hrs and 29 mins
- Unabridged
-
Overall
-
Performance
-
Story
A new spine-chilling collection of 12 adventures packed with terrifying Doctor Who monsters and villains, just in time for Halloween. Written by Jacqueline Rayner, Mike Tucker, Paul Magrs, Richard Dungworth, Scott Handcock and Craig Donaghy, each story stars an incarnation of the Doctor on a brand-new adventure in time and space. Each also features a frightening nemesis for the Doctor to face, plus appearances from favourite friends and companions such as Sarah Jane, Jo, Ace and Donna.
-
-
Halloween Who
- By Ian on 11-29-17
By: Jacqueline Rayner, and others
-
Doctor Who: The Time Travel Collection
- 1st, 3rd, 4th & 6th Doctor Novelisations
- By: Glyn Jones, Terrance Dicks, Douglas Adams, and others
- Narrated by: Maureen O'Brien, Richard Franklin, Lalla Ward, and others
- Length: 24 hrs and 10 mins
- Unabridged
-
Overall
-
Performance
-
Story
Four exciting novelisations of classic TV stories in which the Doctor and his companions traverse the Fourth Dimension. This collection includes Doctor Who: The Space Museum, Doctor Who and the Day of the Daleks, Doctor Who: City of Death and Doctor Who: The Two Doctors.
By: Glyn Jones, and others
-
Doctor Who: Twelve Doctors of Christmas
- By: Jacqueline Rayner, Colin Brake, Richard Dungworth, and others
- Narrated by: Adjoa Andoh, Chris Addison, Rachael Stirling, and others
- Length: 5 hrs and 46 mins
- Unabridged
-
Overall
-
Performance
-
Story
A new collection of Christmas adventures, starring 12 incarnations of the Doctor plus many of his friends and enemies. Inside this festive audiobook of Doctor Who stories, you'll find timey-wimey mysteries, travels in the TARDIS, monster-chasing excitement and plenty of Christmas magic. Find out what happens when the Third Doctor meets Jackie Tyler, the Seventh Doctor and Ace encounter an alien at Macy's department store, and the Ninth Doctor tries to get Rose a red bicycle for Christmas.
-
-
A Whovian Christmas treat!
- By Stephen W Osborne on 12-15-16
By: Jacqueline Rayner, and others
-
Doctor Who: Twelfth Doctor Tales
- Twelfth Doctor Audio Originals
- By: George Mann, Cavan Scott, James Goss, and others
- Narrated by: Clare Higgins, David Schofield, Jemma Redgrave, and others
- Length: 11 hrs and 59 mins
- Unabridged
-
Overall
-
Performance
-
Story
Jemma Redgrave, Clare Higgins, Nicola Bryant and Dan Starkey are among the readers of this exclusive collection of nine original audio adventures. Join the Twelfth Doctor, as played on TV by Peter Capaldi, as he meets friends and enemies new and old on these journeys in time and space.
-
-
Overall Very Good
- By Andy on 12-11-21
By: George Mann, and others
-
Doctor Who: The Ruby's Curse
- River Song Novel
- By: Alex Kingston
- Narrated by: Alex Kingston
- Length: 8 hrs and 20 mins
- Unabridged
-
Overall
-
Performance
-
Story
From the top-security confines of Stormcage to the barbarism of first-century Egypt, River battles to find the Eye of Horus before its powers are used to transform the universe. To succeed, she must team up with a most unlikely ally - her own fictional alter ego, Melody. And together they must solve another mystery: Is fiction changing into fact - or is fact changing into fiction?
-
-
Timey-Wimey Whirlwind of Fun
- By Mark M. on 05-22-21
By: Alex Kingston
-
Doctor Who: The Master Collection
- Five Complete Classic Novelisations
- By: Malcolm Hulke, Barry Letts, Christopher H Bidmead
- Narrated by: Geoffrey Beevers, Barry Letts, Peter Davison, and others
- Length: 23 hrs and 18 mins
- Unabridged
-
Overall
-
Performance
-
Story
Five classic novelisations of TV adventures featuring the Doctor's arch enemy, the Master! In Doctor Who and the Doomsday Weapon by Malcolm Hulke, the Master has stolen the Time Lord's files on a weapon which could make him ruler of the Galaxy. In Doctor Who and the Daemons by Barry Letts, secret ceremonies have been designed to conjure up a horribly powerful being from another planet.
-
-
wonderful collection
- By Dagmar on 06-02-18
By: Malcolm Hulke, and others
-
Doctor Who: Tales of Terror
- By: Jacqueline Rayner, Mike Tucker, Paul Magrs, and others
- Narrated by: Sophie Aldred, Rachael Stirling, Adjoa Andoh, and others
- Length: 7 hrs and 29 mins
- Unabridged
-
Overall
-
Performance
-
Story
A new spine-chilling collection of 12 adventures packed with terrifying Doctor Who monsters and villains, just in time for Halloween. Written by Jacqueline Rayner, Mike Tucker, Paul Magrs, Richard Dungworth, Scott Handcock and Craig Donaghy, each story stars an incarnation of the Doctor on a brand-new adventure in time and space. Each also features a frightening nemesis for the Doctor to face, plus appearances from favourite friends and companions such as Sarah Jane, Jo, Ace and Donna.
-
-
Halloween Who
- By Ian on 11-29-17
By: Jacqueline Rayner, and others
-
Doctor Who: The Time Travel Collection
- 1st, 3rd, 4th & 6th Doctor Novelisations
- By: Glyn Jones, Terrance Dicks, Douglas Adams, and others
- Narrated by: Maureen O'Brien, Richard Franklin, Lalla Ward, and others
- Length: 24 hrs and 10 mins
- Unabridged
-
Overall
-
Performance
-
Story
Four exciting novelisations of classic TV stories in which the Doctor and his companions traverse the Fourth Dimension. This collection includes Doctor Who: The Space Museum, Doctor Who and the Day of the Daleks, Doctor Who: City of Death and Doctor Who: The Two Doctors.
By: Glyn Jones, and others
-
Doctor Who: Twelve Doctors of Christmas
- By: Jacqueline Rayner, Colin Brake, Richard Dungworth, and others
- Narrated by: Adjoa Andoh, Chris Addison, Rachael Stirling, and others
- Length: 5 hrs and 46 mins
- Unabridged
-
Overall
-
Performance
-
Story
A new collection of Christmas adventures, starring 12 incarnations of the Doctor plus many of his friends and enemies. Inside this festive audiobook of Doctor Who stories, you'll find timey-wimey mysteries, travels in the TARDIS, monster-chasing excitement and plenty of Christmas magic. Find out what happens when the Third Doctor meets Jackie Tyler, the Seventh Doctor and Ace encounter an alien at Macy's department store, and the Ninth Doctor tries to get Rose a red bicycle for Christmas.
-
-
A Whovian Christmas treat!
- By Stephen W Osborne on 12-15-16
By: Jacqueline Rayner, and others
-
Doctor Who: Twelfth Doctor Tales
- Twelfth Doctor Audio Originals
- By: George Mann, Cavan Scott, James Goss, and others
- Narrated by: Clare Higgins, David Schofield, Jemma Redgrave, and others
- Length: 11 hrs and 59 mins
- Unabridged
-
Overall
-
Performance
-
Story
Jemma Redgrave, Clare Higgins, Nicola Bryant and Dan Starkey are among the readers of this exclusive collection of nine original audio adventures. Join the Twelfth Doctor, as played on TV by Peter Capaldi, as he meets friends and enemies new and old on these journeys in time and space.
-
-
Overall Very Good
- By Andy on 12-11-21
By: George Mann, and others
-
Doctor Who: The Ruby's Curse
- River Song Novel
- By: Alex Kingston
- Narrated by: Alex Kingston
- Length: 8 hrs and 20 mins
- Unabridged
-
Overall
-
Performance
-
Story
From the top-security confines of Stormcage to the barbarism of first-century Egypt, River battles to find the Eye of Horus before its powers are used to transform the universe. To succeed, she must team up with a most unlikely ally - her own fictional alter ego, Melody. And together they must solve another mystery: Is fiction changing into fact - or is fact changing into fiction?
-
-
Timey-Wimey Whirlwind of Fun
- By Mark M. on 05-22-21
By: Alex Kingston
-
Doctor Who: The Master Collection
- Five Complete Classic Novelisations
- By: Malcolm Hulke, Barry Letts, Christopher H Bidmead
- Narrated by: Geoffrey Beevers, Barry Letts, Peter Davison, and others
- Length: 23 hrs and 18 mins
- Unabridged
-
Overall
-
Performance
-
Story
Five classic novelisations of TV adventures featuring the Doctor's arch enemy, the Master! In Doctor Who and the Doomsday Weapon by Malcolm Hulke, the Master has stolen the Time Lord's files on a weapon which could make him ruler of the Galaxy. In Doctor Who and the Daemons by Barry Letts, secret ceremonies have been designed to conjure up a horribly powerful being from another planet.
-
-
wonderful collection
- By Dagmar on 06-02-18
By: Malcolm Hulke, and others
-
Doctor Who: The Monsters Collection
- Five Complete Classic Novelisations
- By: Gerry Davis, Brian Hayles
- Narrated by: Anneke Wills, Michael Kilgarriff, David Troughton, and others
- Length: 21 hrs and 2 mins
- Unabridged
-
Overall
-
Performance
-
Story
Five classic novelisations of TV adventures featuring Cybermen, Yeti and Ice Warriors! In Doctor Who and the Cybermen by Gerry Davis, a weather control station on the moon comes under attack from a deadly army of Cybermen. In Doctor Who and the Tomb of the Cybermen by the same author, a party of archaeologists uncovers a vast reserve of dormant Cybermen - who then come terrifyingly to life.
-
-
Fun except last story.
- By Jim on 07-03-20
By: Gerry Davis, and others
-
Doctor Who: Engines of War
- By: George Mann
- Narrated by: Nicholas Briggs
- Length: 7 hrs and 57 mins
- Original Recording
-
Overall
-
Performance
-
Story
The Great Time War has raged for centuries, ravaging the universe. Scores of human colony planets are now overrun by Dalek occupation forces. A weary, angry Doctor leads a flotilla of Battle TARDISes against the Dalek stronghold but in the midst of the carnage, the Doctor's TARDIS crashes to a planet below: Moldox. As the Doctor is trapped in an apocalyptic landscape, Dalek patrols roam amongst the wreckage, rounding up the remaining civilians.
-
-
Nick Briggs delivers a great entry for Doctor Who!
- By Ace on 01-27-15
By: George Mann
-
Doctor Who: Time Lord Fairy Tales
- By: Justin Richards
- Narrated by: Adjoa Andoh, Andrew Brooke, Anne Reid, and others
- Length: 5 hrs and 49 mins
- Unabridged
-
Overall
-
Performance
-
Story
Penguin presents the unabridged, downloadable audiobook edition of Doctor Who: Time Lord Fairy Tales read by Tom Baker, Joanna Page, Adjoa Andoh, Ingrid Oliver, Anne Reid, Dan Starkey, Sophie Aldred, Rachael Stirling, Samuel Anderson, Nicholas Briggs, Pippa Bennett-Warner, Yasmin Paige, Michelle Gomez, Paul McGann and Andrew Brooke.
-
-
Loved it!
- By Cathy Dineen on 10-12-15
By: Justin Richards
-
Doctor Who: Scratchman
- 4th Doctor Novel
- By: Tom Baker
- Narrated by: Tom Baker
- Length: 8 hrs and 40 mins
- Unabridged
-
Overall
-
Performance
-
Story
In his first-ever Doctor Who novel, Tom Baker’s incredible imagination is given free rein. A story so epic it was originally intended for the big screen, Scratchman is a gripping, white-knuckle thriller almost 40 years in the making. The Doctor, Harry and Sarah Jane Smith arrive at a remote Scottish island when their holiday is cut short by the appearance of strange creatures - hideous scarecrows who are preying on the local population. The islanders are living in fear, and the Doctor vows to save them all.
-
-
Narrated and Written by THE (4th) Doctor!!
- By NM on 01-31-19
By: Tom Baker
-
The Last Wish
- By: Andrzej Sapkowski
- Narrated by: Peter Kenny
- Length: 10 hrs and 17 mins
- Unabridged
-
Overall
-
Performance
-
Story
Geralt of Rivia is a witcher. A cunning sorcerer. A merciless assassin. And a cold-blooded killer. His sole purpose: to destroy the monsters that plague the world. But not everything monstrous-looking is evil, and not everything fair is good...and in every fairy tale there is a grain of truth.
-
-
Better than the show, of course!
- By Cheryl Dias on 01-07-20
-
Doctor Who: The Second UNIT Collection
- By: Malcolm Hulke, Terrance Dicks
- Narrated by: Caroline John, Geoffrey Beevers, Katy Manning
- Length: 19 hrs and 38 mins
- Original Recording
-
Overall
-
Performance
-
Story
In Doctor Who and the Green Death, the Third Doctor, Jo and the Brigadier find a Welsh mining village beset by sudden deaths and a swarm of giant maggots. In Doctor Who and the Time Warrior, the Third Doctor and Sarah investigate disappearances from a top secret research establishment. In Doctor Who and the Dinosaur Invasion, UNIT presides over the evacuation of London caused by the arrival of prehistoric monsters. In Doctor Who and the Planet of the Spiders, UNIT is attacked by an alien influence seeking to retrieve something in the Doctor’s possession.
By: Malcolm Hulke, and others
-
Doctor Who: Ninth Doctor Novels
- 9th Doctor Novels
- By: Justin Richards, Stephen Cole, Jacqueline Rayner
- Narrated by: Camille Coduri, Nicholas Briggs
- Length: 17 hrs and 58 mins
- Unabridged
-
Overall
-
Performance
-
Story
Nicholas Briggs and Camille Coduri are the readers of these three original novels featuring the Ninth Doctor and Rose, as played on TV by Christopher Eccleston and Billie Piper. Join the Doctor and Rose on these journeys in Time and Space as they encounter faceless killers in 1920s London, get trapped in an alien prison camp and discover something very sinister behind the latest video game craze. The stories are The Clockwise Man by Justin Richards, The Monsters Inside by Stephen Cole and Winner Takes All by Jacqueline Rayner.
-
-
for Whovians
- By Jennifer Baratta She/Her on 05-16-19
By: Justin Richards, and others
-
Doctor Who: The Space Travel Collection
- 1st, 2nd, 4th, 5th Doctor Novelisations
- By: Nigel Robinson, Terrance Dicks
- Narrated by: William Russell, Terry Molloy, Jon Culshaw, and others
- Length: 16 hrs and 53 mins
- Original Recording
-
Overall
-
Performance
-
Story
Five classic novelisations of TV stories involving space travel and adventure.
By: Nigel Robinson, and others
-
Shada
- Doctor Who: The Lost Adventure
- By: Douglas Adams, Gareth Roberts
- Narrated by: Lalla Ward
- Length: 11 hrs and 31 mins
- Unabridged
-
Overall
-
Performance
-
Story
The Doctor's old friend and fellow Time Lord Professor Chronotis has retired to Cambridge University - where nobody will notice if he lives for centuries. But now he needs help from the Doctor, Romana, and K-9. When he left Gallifrey he took with him a few little souvenirs - most of them are harmless. But one of them is extremely dangerous. The Worshipful and Ancient Law of Gallifrey isn't a book for Time Tots.It must not be allowed to fall into the wrong hands.
-
-
Like uncovering a lost treasure
- By Hedge Harbor coordinator on 05-03-12
By: Douglas Adams, and others
-
Jurassic Park
- A Novel
- By: Michael Crichton
- Narrated by: Scott Brick
- Length: 15 hrs and 10 mins
- Unabridged
-
Overall
-
Performance
-
Story
An astonishing technique for recovering and cloning dinosaur DNA has been discovered. Now humankind’s most thrilling fantasies have come true. Creatures extinct for eons roam Jurassic Park with their awesome presence and profound mystery, and all the world can visit them - for a price.
-
-
Fantastic Story, Boring Narrator
- By Kindle Customer on 07-31-18
By: Michael Crichton
-
Doctor Who: Twelve Angels Weeping
- Twelve Stories of the Villains from Doctor Who
- By: Dave Rudden
- Narrated by: Dave Rudden, Nicholas Briggs, Pippa Bennett-Warner
- Length: 8 hrs and 50 mins
- Unabridged
-
Overall
-
Performance
-
Story
Penguin presents the audiobook edition of Twelve Angels Weeping written and read by Dave Rudden, with additional narration from Pippa Bennett-Warner and Nicholas Briggs. On every planet that has existed or will exist, there is a winter.... Many of the peoples of Old Earth celebrated a winter festival. A time to huddle together against the cold; a time to celebrate being halfway out of the dark. But shadows are everywhere, and there are some corners of the universe which have bred the most terrible things, lurking in the cold between the stars.
-
-
new adventures for the Doctors
- By Canlyn62 on 02-12-19
By: Dave Rudden
-
We Are Legion (We Are Bob)
- Bobiverse, Book 1
- By: Dennis E. Taylor
- Narrated by: Ray Porter
- Length: 9 hrs and 56 mins
- Unabridged
-
Overall
-
Performance
-
Story
There's a reason We Are Legion was named Audible's Best Science Fiction Book of 2016: Its irresistibly irreverent wit! Bob Johansson has just sold his software company for a small fortune and is looking forward to a life of leisure. The first item on his to-do list: Spending his newfound windfall. On an urge to splurge, he signs up to have his head cryogenically preserved in case of death. Then he gets himself killed crossing the street. Waking up 117 years later, Bob discovers his mind has been uploaded into a sentient space probe with the ability to replicate itself.
-
-
I returned it. Didn't like it.
- By L. Kollasch on 08-28-19
By: Dennis E. Taylor
Publisher's Summary
Penguin presents the unabridged, downloadable audiobook edition of Doctor Who: 12 Doctors 12 Stories. A brand-new 12th Doctor story for a brand-new 12th Doctor!
Following on from the success of the 50th anniversary paperback anthology, 11 Doctors 11 Stories, this highly-acclaimed collection of short Doctor Who stories contains all of the original 11 adventures plus an exciting new 12th Doctor story written by best-selling US author Holly Black.
Authors featured are Eoin Colfer, Michael Scott, Marcus Sedgwick, Philip Reeve, Patrick Ness, Richelle Mead, Malorie Blackman, Alex Scarrow, Charlie Higson, Derek Landy, Neil Gaiman, and Holly Black.
What listeners say about Doctor Who: 12 Doctors 12 Stories
Average Customer RatingsReviews - Please select the tabs below to change the source of reviews.
-
Overall
-
Performance
-
Story
- Chris Coyne
- 11-23-14
The Twelve Doctors.
Would you listen to Doctor Who: 12 Doctors 12 Stories again? Why?
Yes. Because I'm indicted to all things Doctor Who.
What other book might you compare Doctor Who: 12 Doctors 12 Stories to and why?
Any great omnibus of some of my favorite Sci-fi show.
What about the narrators’s performance did you like?
I wish more former companions could of done more of the narrations, or better still some of the former Doctors.
Did you have an extreme reaction to this book? Did it make you laugh or cry?
Some of the stories were great, some were bad. But I enjoyed listing to all of then.
Any additional comments?
The only stories I didn't like we're the stories concerning the first and fifth Doctors. The rest of the stories were wonderful.
7 people found this helpful
-
Overall
-
Performance
-
Story
- S. Matz
- 08-04-15
Excellent
Great adaptation of a book of short stories from the companions' point of view. Twelve stories for 12 Doctors for fans of the entire run, or newer fans wanting a glimpse of the "whole." Some stories are better than others, but all are a good "read."
5 people found this helpful
-
Overall
-
Performance
-
Story
- Rachel Silver Baring-Gould
- 04-12-15
Some good, some not so good
12 stories, 12 authors, 12 narrators. Hard to rate them as a group. Enjoyable listen, on the whole. A couple of mediocre stories and narrators, but several good ones, too.
5 people found this helpful
-
Overall
-
Performance
-
Story
- Kevin Guzman
- 04-01-16
12 stories of pure delight
These are 12 stories of pure delight. Highly recommend it to any Doctor Who fan.
3 people found this helpful
-
Overall
-
Performance
-
Story
- Jon
- 12-06-16
Nice collection of stories.
I'm not good at reviews, but I can say with certainty that this set is worth listening to. I enjoyed every story. The only way it could have been better is if it had been read by the actors.
2 people found this helpful
-
Overall
-
Performance
-
Story
- justin
- 08-19-16
Great read all aroind
books were amazing. Great stories. The end was an interesting way to leave it all.
2 people found this helpful
-
Overall
-
Performance
-
Story
- Amazon Customer
- 08-15-16
I thought this might be a risk
I really wasn't sure if I would enjoy Doctor Who in book form, or in audiobook, more specifically. I also wasn't familiar with the earlier doctors and was afraid their stories might not resonate for me.
I'm happy to say I was pleasantly surprised throughout. I made myself put at least a say between stories, and I recommend that, because it did help separate the individual stories and doctors. But yes, there was the same feeling of wonder, magic, and exhilaration as the show provides. (How strange to be relieved that a book lives up to screen!)
11 is my favorite doctor, and I was waiting to savor that story, but in truth, I think 10 was the truest to character. 12 was pretty spot-on too, with the sense that Capaldi carries of having some deep secret to forgive or be forgiven for.
All in all, there wasn't a single story I felt cheated by or disappointed in. They are 12 excellent stories, and I'll be looking for more of the Doctor Who audiobooks.
2 people found this helpful
-
Overall
-
Performance
-
Story
- Tad Davis
- 07-21-16
Good diversion
As a way of re-experiencing the many Doctors, the book is great. As an introduction to the Doctor Who universe, I think it's less effective: a Doctor Who novitiate would be better served, in my opinion, by focusing first on a few adventures involving a single Doctor before branching out.
The stories here are somewhat uneven, as are the narrators. The ones that were most resonant for me were the ones for the 11th and 12th Doctors (stories by Neil Gaiman and Holly Black). My least favorite was the one for the first Doctor: I just can't picture William Hartnell with a prosthetic hand. Still, if you're already a Doctor Who fan and want to spend 12 hours being entertained, this will fit the bill nicely.
5 people found this helpful
-
Overall
-
Performance
-
Story
- Jesse
- 06-03-16
Very good overall
I really enjoyed this collection. I only wish I had been able to download this before I had downloaded a couple of the individual stories. The third Doctor's story was fairly boring, though that was mainly because the narrator was pretty one-note. There was absolutely no difference between any of the voices. Jo Grant and the Doctor should not sound the same by any means. Also, the way it was read had absolutely no emotion whatsoever. They might have been discussing what to have for dinner. The others were pretty good though; some superb, others ok.
2 people found this helpful
-
Overall
-
Performance
-
Story
- Jamie Wilson
- 06-02-16
A fun Doctor Who sampler
What did you love best about Doctor Who: 12 Doctors 12 Stories?
Each story caught the personality of each of the doctors very well and each short story is well written.
Who was your favorite character and why?
The Doctor.... what a silly question. Each regeneration of the Doctor is well represented and feels like the adventures belong wedged in between episodes of the show.
What about the narrators’s performance did you like?
I liked all of the narrators and they all did quality work, however, I feel I need to give Nicholas Briggs special mention. His story worked so wonderfully with his voice and narration style that is was just a treat to listen to.
Was this a book you wanted to listen to all in one sitting?
I would try, but it was too long for such a thing.
Any additional comments?
Very fun and recommended for anyone wanting to explore Doctor beyond the version they're familiar with.
2 people found this helpful
-
Overall
-
Performance
-
Story

- Maria
- 01-15-16
Just like watching tv
Very cleverly some of the stories are made extra "realistic" by actually being put in a context with what you've seen on tv
4 people found this helpful
-
Overall
-
Performance
-
Story

- Susan Clark
- 10-07-15
Does not disappoint
Each story is splendid and shows the different characteristics of each Doctor. Well done all!
4 people found this helpful
-
Overall
-
Performance
-
Story

- Kim Thomas
- 09-15-17
Loved every minute
A family of doctor who fans (7, 10 year olds) and we loved it, listening in silent suspense, funny moments and a fair amount of running!
1 person found this helpful