Czechoslovakia, 1935: Viktor Kosárek, a newly trained psychiatrist who studied under Carl Jung, arrives at the infamous Hrad Orlu Asylum for the Criminally Insane. The facility is located in a medieval mountaintop castle surrounded by forests, on a site that is well known for concealing dark secrets going back many centuries. The asylum houses six inmates - the country's most treacherous killers - known to the terrified public as the Devil's Six. Viktor intends to use a new medical technique to prove that these patients share a common archetype of evil, a phenomenon he calls The Devil Aspect.

Human remains are recovered from the bottom of the River Clyde. Not an unusual occurrence, but these have been sleeping the deep, dark sleep for eighteen years. Suddenly Glasgow’s underworld is buzzing with the news that the dredged up bones belong to Gentleman Joe Strachan, Glasgow’s most successful and ruthless armed robber.

Una wants nothing more than to teach, but she has been unable to secure steady employment in Reykjavík. Her savings are depleted, her love life is nonexistent, and she cannot face another winter staring at the four walls of her shabby apartment. Celebrating Christmas and ringing in 1986 in the remote fishing hamlet of Skálar seems like a small price to pay for a chance to earn some teaching credentials and get her life back on track.

In this thrilling supernatural mystery, Sherlock Holmes and Count Dracula must join forces to banish a terrible enemy. Sherlock Holmes is dead. His body lies in a solitary grave on the Sussex Downs, England. But Dr. Watson survives and is now given permission to release tales in Sherlock’s “classified dossier”, those cases that are, dear listener, unbelievable - for their subject matter is of the most outré and grotesque nature.

It's the winter of 1923, and Professor Annalee Spain - a clever but overworked theologian at a small Chicago Bible college - receives a cryptic telegram calling her home to Denver to solve the murder of her beloved but estranged father. For a young Black woman, searching for answers in a city ruled by the KKK could mean real danger. Still, with her literary hero Sherlock Holmes as inspiration, Annalee launches her hunt for clues.

Was the biggest case of his career the worst mistake he ever made? Ten years ago, DCI Jack Logan stopped the serial child-killer dubbed "Mister Whisper", earning himself a commendation, a drinking problem, and a broken marriage in the process...When another child disappears a hundred miles north in the Highlands, Jack is sent to lead the investigation and bring the boy home. But as similarities between the two cases grow, could it be that Jack caught the wrong man all those years ago?

Three linked crimes test Sherlock Holmes’ deductive powers, and his skepticism about the supernatural, to the limit.  

When ex-detective inspector Daniel Hawthorne and his sidekick, author Anthony Horowitz, are invited to an exclusive literary festival on Alderney, an idyllic island off the south coast of England, they don’t expect to find themselves in the middle of murder investigation - or to be trapped with a cold-blooded killer in a remote place with a murky, haunted past.  

Guy is about to finish writing his breakthrough online article. He overheard the story by chance in a pub and it’s guaranteed to go viral - all he needs to do is persuade the World’s Unluckiest Man to talk to him. His best friend Larry’s quest for killer clickbait material has led him to a recently appeared shanty town in Glasgow, where he finds some kind of urban voodoo cult. Ex-cop Sam has already come face-to-face with the terrifying force behind both these phenomena, but he’s been trying to put it out of his mind. 

The Carolinas, 1699: The citizens of Fount Royal believe a witch has cursed their town with inexplicable tragedies -- and they demand that beautiful widow Rachel Howarth be tried and executed for witchcraft. Presiding over the trial is traveling magistrate Issac Woodward, aided by his astute young clerk, Matthew Corbett. Believing in Rachel's innocence, Matthew will soon confront the true evil at work in Fount Royal....

In Edwardian Suffolk, a manor house stands alone in a lost corner of the Fens: a glinting wilderness of water whose whispering reeds guard ancient secrets. Maud is a lonely child growing up without a mother, ruled by her repressive father. When he finds a painted medieval devil in a graveyard, unhallowed forces are awakened. Maud's battle has begun. She must survive a world haunted by witchcraft, the age-old legends of her beloved fen - and the even more nightmarish demons of her father's past. 

Former soldier. Ex-copper. Current man on the edge. Shunned by his old colleagues, and dividing his time between a dead-end job and the bottom of a whisky bottle, former Police Scotland detective superintendent Bob Hoon’s life is a mess. Then an old face from Hoon’s Special Forces days turns up asking for help: His teenage daughter has been missing for months, the police have drawn a blank, and he needs the kind of help that only Hoon can provide. And besides, Hoon owes him one.

Victorian London is a cesspool of crime, and Scotland Yard has only 12 detectives - known as “The Murder Squad” - to investigate thousands of murders every month. Created after the Metropolitan Police’s spectacular failure to capture Jack the Ripper, The Murder Squad suffers rampant public contempt. They have failed their citizens. When Walter Day, the squad’s newest hire, is assigned the case of the murdered detective, he finds a strange ally in the Yard’s first forensic pathologist, Dr. Bernard Kingsley.

A series of grisly murders rocks London. At each location, only a jumble of bones remains of the deceased, along with a bizarre sphere covered in strange symbols. The son of the latest victim seeks the help of Sherlock Holmes and his former partner, Dr. John Watson. They discover the common thread tying together the murders. Bizarre geometries, based on ancient schematics, enable otherworldly creatures to enter our dimension, seeking to wreak havoc and destruction. 

From New York Times best-selling author Erik Larson comes his first venture into fiction, an otherworldly tale of intrigue and the impossible that marshals his trademark approach to nonfiction to create something new: a ghost story thoroughly grounded in history. Pioneering psychologist William James leads an expedition to a remote isle in search of answers after a family inexplicably vanishes. Was the cause rooted in the physical world...or were there forces more paranormal and sinister at work?