Echo Ridge is small-town America. Ellery's never been there, but she's heard all about it. Her aunt went missing there at age 17. And only five years ago, a homecoming queen put the town on the map when she was killed. Now, Ellery has to move there to live with a grandmother she barely knows. The town is picture-perfect, but it's hiding secrets. And before school even begins for Ellery, someone has declared open season on homecoming, promising to make it as dangerous as it was five years ago. Then, almost as if to prove it, another girl goes missing.

Ivy, Mateo, and Cal used to be close. Now all they have in common is Carlton High and the beginning of a very bad day. So when the three unexpectedly run into each other, they decide to avoid their problems by ditching. Just the three of them, like old times. Except they’ve barely left the parking lot before they run out of things to say...until they spot another Carlton High student skipping school - and follow him to the scene of his own murder. In one chance move, their day turns from dull to deadly. And it’s about to get worse.

Milly, Aubrey, and Jonah Story are cousins, but they barely know each another, and they've never even met their grandmother. Rich and reclusive, she disinherited their parents before they were born. So when they each receive a letter inviting them to work at her island resort for the summer, they're surprised...and curious.

On September 5, a little after midnight, Death-Cast calls Mateo Torrez and Rufus Emeterio to give them some bad news: They're going to die today. Mateo and Rufus are total strangers, but, for different reasons, they're both looking to make a new friend on their End Day. The good news: There's an app for that. It's called The Last Friend, and through it Rufus and Mateo are about to meet up for one last great adventure - to live a lifetime in a single day.

Ellingham Academy is a famous private school in Vermont for the brightest thinkers, inventors, and artists. It was founded by Albert Ellingham, an early 20th century tycoon, who wanted to make a wonderful place full of riddles, twisting pathways, and gardens. "A place", he said, "where learning is a game." Shortly after the school opened, his wife and daughter were kidnapped. The only real clue was a mocking riddle listing methods of murder, signed with the frightening pseudonym "Truly, Devious".

What do the queen bee, star athlete, valedictorian, stoner, loner, and music geek all have in common? They were all invited to a scholarship dinner, only to discover it’s a trap. Someone has locked them into a room with a bomb, a syringe filled with poison, and a note saying they have an hour to pick someone to kill...or else everyone dies.

Kacey is the new girl in Broken Falls. When she moved in with her father, she stepped into a brand-new life. A life with a stepbrother, a stepmother, and, strangest of all, an adoring younger half sister. Kacey's new life is eerily charming compared with the wild highs and lows of the old one she lived with her volatile mother. And everyone is so nice in Broken Falls - she's even been welcomed into a tight new circle of friends. Bailey and Jade invite her to do everything with them.

In Gold Coast, Long Island, everything from the expensive downtown shops to the manicured beaches, to the pressed uniforms of Jill Newman and her friends, looks perfect. But as Jill found out three years ago, nothing is as it seems. Freshman year Jill's best friend, the brilliant, dazzling Shaila Arnold, was killed by her boyfriend. After that dark night on the beach, Graham confessed, the case was closed, and Jill tried to move on.

Seventeen-year-old Cassie is a natural at reading people. Piecing together the tiniest details, she can tell you who you are and what you want. But, it's not a skill that she's ever taken seriously. That is, until the FBI come knocking: they've begun a classified program that uses exceptional teenagers to crack infamous cold cases, and they need Cassie.

Jess needs a fresh start. She’s broke and alone, and she’s just left her job under less than ideal circumstances. Her half brother, Ben, didn’t sound thrilled when she asked if she could crash with him for a bit, but he didn’t say no, and surely everything will look better from Paris. Only when she shows up - to find a very nice apartment, could Ben really have afforded this? - he’s not there. The longer Ben stays missing, the more Jess starts to dig into her brother’s situation, and the more questions she has.

Pip is about to head to college, but she is still haunted by the way her last investigation ended. She’s used to online death threats in the wake of her viral true-crime podcast, but she can’t help noticing an anonymous person who keeps asking her: Who will look for you when you’re the one who disappears? 

Shay Miller wants to find love, but it eludes her. She wants to be fulfilled, but her job is a dead end. She wants to belong, but her life is increasingly lonely. Until Shay meets the Moore sisters. Cassandra and Jane live a life of glamorous perfection, and always get what they desire. When they invite Shay into their circle, everything seems to get better. Shay would die for them to like her. She may have to. 

There are no more cheerleaders in the town of Sunnybrook. First there was the car accident - two girls dead after hitting a tree on a rainy night. Not long after, the murders happened. Those two girls were killed by the man next door. The police shot him, so no one will ever know his reasons. Monica's sister was the last cheerleader to die. After her suicide, Sunnybrook High disbanded the cheer squad. No one wanted to be reminded of the girls they'd lost.

She doesn't remember that night. But she will never be the same. One moment, Dahlia is a successful Harvard student; the next, she wakes up from a party, the victim of a brutal assault. Her life veers into a tailspin, and what's worse - her memory of the attack has been ripped away, leaving a cold rage in its wake. Now, years later, Dahlia is a tattooed paralegal suffering from PTSD and still haunted by that night. Until one day, a video surfaces online, and Dahlia sees her attack for the first time. Now she knows what happened to her. And she knows who is to blame.

In 16-year-old Mike Hernandez's life, only one thing is clear: Gay is not okay. His family's life revolves around the church, a church run by the vocally intolerant Pastor Myers, so Mike has resolved to spend his life in the closet. His only escape - besides the occasional, anonymous gay make-out session - is his art. He pours his complicated emotions into risque drawings he keeps in a secret sketchbook. A sketchbook he carries everywhere. When his sketchbook goes missing in the middle of Sunday school, Mike is sure his life is over.