Thanks to her best friend, Reagan, Mallory Moss knows the rules of middle school. The most important one? You have to fit in to survive. But then Jennifer Chan moves in across the street, and that rule doesn’t seem to apply. Jennifer doesn’t care about the laws of middle school, or the laws of the universe. She believes in aliens—and she thinks she can find them. Then Jennifer goes missing. Using clues from Jennifer’s journals, Mallory goes searching. But the closer she gets, the more Mallory has to confront why Jennifer might have run . . . and face the truth within herself.

As a boy, Will Klein had a hero: his older brother, Ken. Then, on a warm suburban night in the Kleins’ affluent New Jersey neighborhood, a young woman—a girl Will had once loved—was found brutally murdered in her family’s basement. The prime suspect: Ken Klein. With the evidence against him overwhelming, Ken simply vanished. And when his shattered family never heard from Ken again, they were sure he was gone for good.

Surviving a werewolf attack should’ve been the strangest thing to happen to me tonight. But no, the universe had other plans. Now, I’m stuck dealing with a broodingly hot guy named Wesley St. John—who seems way too comfortable with murder. Definitely a red flag, right? Wes isn’t just some guy I stumbled upon—he’s a protector, but not the friendly kind. His job is to keep the supernatural world in check, and my ignorance is making things complicated.

Sam's cosy life as daughter of the deputy prime minister is about to end. These are turbulent times. Borders have closed, and protests are turning violent. The government blames the country's youth and is cracking down hard. Mobile phones are blocked; gatherings are banned, and dissent is brutally crushed. Sam is torn between family loyalty and doing what is right. When she meets Ava and Lucas, her mind is made up.

Kelsey has lived most of her life in a shadow of suspicion, raised to see danger everywhere. Her mother hasn't set foot outside their front door in 17 years, since she escaped from her kidnappers with nothing but her attacker's baby growing inside her - Kelsey. Kelsey knows she's supposed to keep a low profile and stay off the grid for their protection, but that plan is shattered when her dramatic car accident and rescue by volunteer firefighter and classmate Ryan Baker sparks media coverage.

In Sloane’s world, true feelings are forbidden, teen suicide is an epidemic, and the only solution is The Program. Sloane knows better than to cry in front of anyone. With suicide now an international epidemic, one outburst could land her in The Program, the only proven course of treatment. Sloane’s parents have already lost one child; Sloane knows they’ll do anything to keep her alive. She also knows that everyone who’s been through The Program returns as a blank slate. Because their depression is gone - but so are their memories.

When Alexis's little sister Kasey becomes obsessed with an antique doll, Alexis thinks she is just being her usual weird self. Things get weirder, though, when their house starts changing. Doors open and close by themselves; water boils on the unlit stove; and an unplugged air conditioner blasts cold air.

Rev works hard to keep the demons of the time before his adoption at bay...until a letter from his father after his 18th birthday brings the trauma of his childhood hurtling back. Emma escapes real life by perfecting the online game she built from scratch. Coding is way easier than facing her parents' nasty relationship or the growing distance with her best friend...But when an online troll's harassment starts to escalate, she fears for her safety. When Rev and Emma meet, they're buckling under the weight of their secrets. Though both of them find it hard to put their problems into words, they connect instantly and deeply. Rev and Emma's problems might be worlds apart, but they promise to help each other no matter what. But promises are made to be tested, and some things hurt more than we can tell.

Celestine North lives a perfect life. She's a model daughter and sister, she's well liked by her classmates and teachers, and she's dating the impossibly charming Art Crevan. But then Celestine encounters a situation in which she makes an instinctive decision. She breaks a rule and now faces life-changing repercussions. She could be imprisoned. She could be branded. She could be found flawed.

Violet Ambrose is grappling with two major issues: Jay Heaton and her morbid secret ability. While the 16-year-old is confused by her new feelings for her best friend since childhood, she is more disturbed by her "power" to sense dead bodies or at least those that have been murdered. Since she was a little girl, she has felt the echoes the dead leave behind in the world . . . and the imprints that attach to their killers.

Sixteen-year-old Julia Phillips buries herself in guilt after killing her best friend, Monica, in a car accident. Julia awoke in the hospital with a broken leg, a new talent for drawing, and false memories of the accident, in which she dies and Monica lives. The doctors attribute this to her head injury, but no one can explain how a bracelet engraved with her name ended up at the scene of the accident. A bracelet no one has ever seen before.

Amy is watching TV when the world is attacked by Them. Most of the population is overtaken, but Amy manages to survive - and even rescue "Baby" a toddler she finds in an abandoned supermarket. Then, after years of hiding, they are miraculously rescued and taken to New Hope, a colony of survivors living in a former government research compound. While at first the colony seems like a dream, with plenty of food, safety, and shelter, New Hope slowly reveals that it is far from ideal. And Amy soon realizes that unless things change, she'll lose Baby - and much more.

Elisa Wright is a mom and wife, living a nice, quiet life in a nice, quiet town. She’s also convinced her brother-in-law is a murderer. Josh has one dead wife and one missing fiancée, and though he grieved for them he starts dating someone new. Elisa fears for that woman’s safety, and she desperately wants to know what happened to her friend, Josh’s missing fiancée.

Sixteen-year-old Sasha Lawson has only ever known one small, ordinary life. When she was young, she loved her grandfather's stories of parallel worlds, inhabited by girls who looked like her but led totally different lives. Sasha never believed such worlds were real - until now, when she finds herself thrust into one against her will. To prevent imminent war, Sasha must slip into the life of an alternate version of herself, a princess who has vanished on the eve of her arranged marriage. If Sasha succeeds in fooling everyone, she will be returned home; if she fails, she'll be trapped in another girl's life forever.

Marguerite Caine grew up surrounded by cutting-edge scientific theories, thanks to her brilliant physicist parents. Yet nothing is more astounding than her mother's latest invention - a device called the Firebird, which allows people to leap into alternate dimensions.

Violet Ambrose is grappling with two major issues: Jay Heaton and her morbid secret ability. While the 16-year-old is confused by her new feelings for her best friend since childhood, she is more disturbed by her "power" to sense dead bodies or at least those that have been murdered. Since she was a little girl, she has felt the echoes the dead leave behind in the world . . . and the imprints that attach to their killers.

Amy is watching TV when the world is attacked by Them. Most of the population is overtaken, but Amy manages to survive - and even rescue "Baby" a toddler she finds in an abandoned supermarket. Then, after years of hiding, they are miraculously rescued and taken to New Hope, a colony of survivors living in a former government research compound. While at first the colony seems like a dream, with plenty of food, safety, and shelter, New Hope slowly reveals that it is far from ideal. And Amy soon realizes that unless things change, she'll lose Baby - and much more.

Marguerite Caine grew up surrounded by cutting-edge scientific theories, thanks to her brilliant physicist parents. Yet nothing is more astounding than her mother's latest invention - a device called the Firebird, which allows people to leap into alternate dimensions.

The noises, faint, fleeting, whispered into her consciousness like wraiths passing in the night. Twelve-year-old Erin Willit opened her eyes to darkness lit only by the dim green nightlight near her closet door and the faint glow of a street lamp through her front window. She felt her forehead wrinkle, the fingers of one hand curl as she tried to discern what had awakened her. Something was not right.... Annie Kingston moves to Grove Landing for safety and quiet - and comes face to face with evil.

Last spring, Nikki Beckett vanished, sucked into an underworld known as the Everneath. Now she’s returned - to her old life, her family, her boyfriend - before she’s banished back to the underworld... this time forever. She has six months before the Everneath comes to claim her, six months for good-byes she can’t find the words for, six months to find redemption, if it exists. Nikki longs to spend these precious months forgetting the Everneath and trying to reconnect with her boyfriend, Jack, the person most devastated by her disappearance - and the one person she loves more than anything.

It's the end of the world. Six students have taken cover in Cortege High but shelter is little comfort when the dead outside won't stop pounding on the doors. One bite is all it takes to kill a person and bring them back as a monstrous version of their former self. To Sloane Price, that doesn't sound so bad. Six months ago, her world collapsed and she's failed to find a reason to keep going. Now seems like the perfect time to give up. As Sloane eagerly waits for the barricades to fall, she's forced to witness the apocalypse through the eyes of five people who actually want to live.

Juliet Young always writes letters to her mother, a world-traveling photojournalist. Even after her mother's death, she leaves letters at her grave. It's the only way Juliet can cope. Declan Murphy isn't the sort of guy you want to cross. In the midst of his court-ordered community service at the local cemetery, he's trying to escape the demons of his past. When Declan reads a haunting letter left beside a grave, he can't resist writing back. Soon, he's opening up to a perfect stranger, and their connection is immediate.

How do you let go of something you've never had? Junior year for Brooke Winters is supposed to be about change. She's transferring schools, starting fresh, and making plans for college so she can finally leave her hometown, her family, and her past behind. But all of her dreams are shattered one hot summer afternoon when her mother is arrested for killing Brooke's abusive father. No one really knows what happened that day, if it was premeditated or self-defense, whether it was right or wrong. And now Brooke and her siblings are on their own.

Eleven minutes passed before Delaney Maxwell was pulled from the icy waters of a Maine lake by her best friend, Decker Phillips. By then her heart had stopped beating. Her brain had stopped working. She was dead. And yet she somehow defied medical precedent to come back seemingly fine - despite the scans that showed significant brain damage. Everyone wants Delaney to be all right, but she knows she's far from normal. Pulled by strange sensations she can't control or explain, Delaney finds herself drawn to the dying. Is her altered brain now predicting death, or causing it?

For Kitty Doe, it seems like an easy choice. She can either spend her life as a III in misery, looked down upon by the higher ranks and forced to leave the people she loves, or she can become a VII and join the most powerful family in the country. If she says yes, Kitty will be Masked - surgically transformed into Lila Hart, the Prime Minister's niece, who died under mysterious circumstances. As a member of the Hart family, she will be famous. She will be adored. And for the first time, she will matter.

Two days before the start of her junior year, 17-year-old Janelle Tenner is hit by a pickup truck and killed - as in blinding light, scenes of her life flashing before her, and then nothing. Except the next thing she knows, she's opening her eyes to find Ben Michaels, a loner from her high school whom Janelle has never talked to, leaning over her. And even though it isn't possible, she knows - with every fiber of her being - that Ben has somehow brought her back to life.

What if finding her means losing himself? Seventeen-year-old Bo has always had delusions that he could travel through time. When he was 10, Bo claimed to have witnessed the Titanic hit an iceberg, and at 15, he found himself on a Civil War battlefield, horrified by the bodies surrounding him. So when his concerned parents send him to a school for troubled youth, Bo assumes he knows the truth: that he's actually attending Berkshire Academy, a school for kids who, like Bo, have "superpowers".

Jaycee and Rachel were best friends. But that was before... before that terrible night at the old house. Before Rachel shut Jaycee out. Before Jaycee chose Skyler over Rachel. Then Rachel is found dead. The police blame a growing gang problem in their small town, but Jaycee is sure it has to do with that night at the old house. Rachel's text is the first clue - starting Jaycee on a search that leads to a shocking secret. Rachel's death was no random crime, and Jaycee must figure out who to trust before she can expose the truth.

As a boy, Will Klein had a hero: his older brother, Ken. Then, on a warm suburban night in the Kleins’ affluent New Jersey neighborhood, a young woman—a girl Will had once loved—was found brutally murdered in her family’s basement. The prime suspect: Ken Klein. With the evidence against him overwhelming, Ken simply vanished. And when his shattered family never heard from Ken again, they were sure he was gone for good.

For years, Sarah Farber and her best friend, Jennifer, kept what they called the Never List: A list of actions to be avoided at all costs, for safety’s sake. But one night, against their best instincts, they accept a cab ride -one with grave, everlasting consequences. For the next three years, they are held captive with two other girls in a dungeon-like cellar by a connoisseur of sadism. Ten years later, Sarah’s abductor is up for parole and she can no longer ignore the twisted letters he sends to her from prison.