Inertia, force, mass, gravity, velocity, acceleration...cause and effect. Liz Emerson doesn't understand any of it. But I do. I understand how we fall. Where we fall. Why we fall. I understand her sadness and loneliness and silence, her shattered heart. It doesn't have to bethis way, does it? It wasn't always this way, was it? Stay alive, Liz Emerson, stay alive.

Autumn always knew exactly who she was: a talented artist and a loyal friend. Shay was defined by two things: her bond with her twin sister, Sasha, and her love of music. And Logan has always turned to writing love songs when his real love life was a little less than perfect. But when tragedy strikes each of them, somehow music is no longer enough. Now Logan is a guy who can't stop watching vlogs of his dead ex-boyfriend. Shay is a music blogger who's struggling to keep it together. And Autumn sends messages that she knows can never be answered.

Dara and Nick used to be inseparable, but that was before - before Dara kissed Parker, before Nick lost him as her best friend, before the accident that left Dara's beautiful face scarred. Now the two sisters, who used to be so close, aren't speaking. In an instant Nick lost everything and is determined to use the summer to get it all back.

Alex Craft knows how to kill someone. And she doesn't feel bad about it. Three years ago, when her older sister, Anna, was murdered and the killer walked free, Alex uncaged the language she knows best - the language of violence. While her own crime goes unpunished, Alex knows she can't be trusted among other people. Not with Jack, who wants to really know her but still feels guilty over the role he played the night Anna's body was discovered. And not with Peekay, the kid with a defiant streak who befriends Alex while they volunteer at an animal shelter. Not anyone.

Samantha Kingston has it all: the world's most crush-worthy boyfriend, three amazing best friends, and first pick of everything at Thomas Jefferson High—from the best table in the cafeteria to the choicest parking spot. Friday, February 12, should be just another day in her charmed life. Instead, it turns out to be her last. Then she gets a second chance. Seven chances, in fact.

Miles Halter is fascinated by famous last words - and tired of his safe life at home. He leaves for boarding school to seek what the dying poet François Rabelais called the “Great Perhaps”. Much awaits Miles at Culver Creek, including Alaska Young, who will pull Miles into her labyrinth and catapult him into the Great Perhaps.

It’s been five years since Summer Marks was murdered in the woods. Everyone thinks Mia and Brynn killed their best friend. That driven by their obsession with a novel called The Way into Lovelorn the three girls had imagined themselves into the magical world where their fantasies became twisted, even deadly. The only thing is: They didn’t do it. On the anniversary of Summer’s death, a seemingly insignificant discovery resurrects the mystery and pulls Mia and Brynn back together again, and the girls must confront what really happened in the woods all those years ago.

Tall, meaty, muscle-bound, and hairier than most throw rugs, Dylan doesn't look like your average 15-year-old, so naturally, high school has not been kind to him. To make matters worse, on the day his school bans hats (his preferred camouflage), Dylan goes up on his roof only to fall and wake up in the hospital with a broken leg - and a mandate to attend group therapy for self-harmers. Dylan vows to say nothing and zones out at therapy - until he meets Jamie. She's funny, smart, and so stunning, even his womanizing best friend, JP, would be jealous.

When Adam Blake lands the best elective ever in his senior year, serving as an aide to the school psychologist, he thinks he's got it made. Sure, it means a lot of sitting around, which isn't easy for a guy with ADHD, but he can't complain, since he gets to spend the period texting all his friends. Then the doctor asks him to track down the troubled freshman who keeps dodging her, and Adam discovers that the boy is Julian - the foster brother he hasn't seen in five years.

Postcard-perfect Jar Island is home to charming tourist shops, pristine beaches, amazing oceanfront homes - and three girls secretly plotting revenge. KAT is sick and tired of being bullied by her former best friend. LILLIA has always looked out for her little sister, so when she discovers that one of her guy friends has been secretly hooking up with her, she’s going to put a stop to it. MARY is perpetually haunted by a traumatic event from years past, and the boy who’s responsible has yet to get what’s coming to him. None of the girls can act on their revenge fantasies alone without being suspected. But together…anything is possible .

They say Delia burned herself to death in her stepfather's shed. They say it was suicide. But June doesn't believe it. June and Delia used to be closer than anything. Best friends in that way that comes before everyone else - before guys, before family. It was like being in love, but more. They had a billion secrets tying them together like thin silk cords. But one night a year ago, everything changed. June, Delia, and June's boyfriend, Ryan, were just having a little fun. Their good time got out of hand.

Despite my best intentions, I was beginning to understand how my dad saw the world. The shadows haunting every living thing. The secrets inside the lies wrapped in bullshit. Even Gracie’s box of pills was beginning to make sense. For the past five years, Hayley Kincain and her father, Andy, have been on the road, trying to outrun the memories that haunt them both. They moved back to Andy’s hometown to try a “normal” life, but the horrors he saw in the war threaten to destroy their lives.

Tommy and Ozzie have been best friends since the second grade, and boyfriends since eighth. They spent countless days dreaming of escaping their small town - and then Tommy vanished. More accurately, he ceased to exist, erased from the minds and memories of everyone who knew him. Everyone except Ozzie.

Lucille seems to have nothing going for her. With the bills piling in, the house falling apart around her, and her sister's growing distress, it is precisely the worst possible moment for Lucille to fall recklessly in love with her best friend's twin brother, Digby, who is practically engaged.

Henry Denton has spent years being periodically abducted by aliens. Then the aliens give him an ultimatum: The world will end in 144 days, and all Henry has to do to stop it is push a big red button. Only he isn't sure he wants to. After all, life hasn't been great for Henry. His mom is a struggling waitress held together by a thin layer of cigarette smoke. His brother is a jobless dropout who just knocked someone up. His grandmother is slowly losing herself to Alzheimer's.

Samantha Kingston has it all: the world's most crush-worthy boyfriend, three amazing best friends, and first pick of everything at Thomas Jefferson High—from the best table in the cafeteria to the choicest parking spot. Friday, February 12, should be just another day in her charmed life. Instead, it turns out to be her last. Then she gets a second chance. Seven chances, in fact.

When Adam Blake lands the best elective ever in his senior year, serving as an aide to the school psychologist, he thinks he's got it made. Sure, it means a lot of sitting around, which isn't easy for a guy with ADHD, but he can't complain, since he gets to spend the period texting all his friends. Then the doctor asks him to track down the troubled freshman who keeps dodging her, and Adam discovers that the boy is Julian - the foster brother he hasn't seen in five years.

Lucille seems to have nothing going for her. With the bills piling in, the house falling apart around her, and her sister's growing distress, it is precisely the worst possible moment for Lucille to fall recklessly in love with her best friend's twin brother, Digby, who is practically engaged.

When 16-year-old Alice is diagnosed with leukemia, her prognosis is grim. To maximize the time she does have, she vows to spend her final months righting wrongs - however she sees fit. She convinces her friend Harvey, who she knows has always had feelings for her, to help her with a crazy bucket list that's as much about revenge (humiliating her ex-boyfriend and getting back at her archnemesis) as it is about hope (doing something unexpectedly kind for a stranger).

Sophie Winters nearly died. Twice. The first time, she's 14, and escapes a near-fatal car accident with scars, a bum leg, and an addiction to Oxy that'll take years to kick. The second time, she's 17, and it's no accident. Sophie and her best friend Mina are confronted by a masked man in the woods. Sophie survives, but Mina is not so lucky. When the cops deem Mina's murder a drug deal gone wrong, casting partial blame on Sophie, no one will believe the truth: Sophie has been clean for months, and it was Mina who led her into the woods that night for a meeting shrouded in mystery.

Panic is a legendary game played by graduating seniors in the middle-of-nowhere town of Carp, where the stakes are high and the payoff is even higher: After a series of challenges ranging from sleeping in a haunted house to running across a highway blindfolded, one winner takes home a cash prize in the tens of thousands at the end of the summer. Participating players are sworn to secrecy, which means little is known of Panic’s history. Until now.

Miles Halter is fascinated by famous last words - and tired of his safe life at home. He leaves for boarding school to seek what the dying poet François Rabelais called the “Great Perhaps”. Much awaits Miles at Culver Creek, including Alaska Young, who will pull Miles into her labyrinth and catapult him into the Great Perhaps.

The last time Lex was happy, it was before. When she had a family that was whole. A boyfriend she loved. Friends who didn't look at her like she might break down at any moment. Now she's just the girl whose brother killed himself. And it feels like that's all she'll ever be. As Lex starts to put her life back together, she tries to block out what happened the night Tyler died. But there's a secret she hasn't told anyone--a text Tyler sent that could have changed everything.

There are stories where the girl gets her prince, and they live happily ever after. (This is not one of those stories.) Jenna Lord's first 16 years were not exactly a fairy tale. Her father is a controlling psycho and her mother is a drunk. She used to count on her older brother - until he shipped off to Iraq. And then, of course, there was the time she almost died in a fire.

Sixteen-year-old physics nerd Aysel is obsessed with plotting her own death. With a mother who can barely look at her without wincing, classmates who whisper behind her back, and a father whose violent crime rocked her small town, Aysel is ready to turn her potential energy into nothingness.

Sixteen-year-old Deirdre Monaghan is a painfully shy but prodigiously gifted musician. She's about to find out she's also a cloverhand - one who can see faeries. Deirdre finds herself infatuated with a mysterious boy who enters her ordinary suburban life, seemingly out of thin air. Trouble is, the enigmatic and gorgeous Luke turns out to be a gallowglass - a soulless faerie assassin. An equally hunky - and equally dangerous - dark faerie soldier named Aodhan is also stalking Deirdre. Sworn enemies, Luke and Aodhan each have a deadly assignment from the Faerie Queen.

Ellery wants to die. Nothing is going right. Her younger sister is dead, and her family is in a shambles. But on the day that she tries to end it all, even the gun won't work. When she tries to return it, she's intercepted by a security guard who also happens to be a boy in one of her classes, Colter Sawyer. Colter recognizes Ellery's desperation and begins working hard to earn her trust.

Perfect Parker Fadley isn't so perfect anymore. She's quit the cheerleading squad, she's dumped her perfect boyfriend, and she's failing school. Her parents are on a constant suicide watch and her counselors think she's playing games, but they don't know that the real reason for this whole mess isn't something she can say out loud. It isn't even something she can say to herself. A horrible thing has happened and it just might be her fault.

Marisol locks me out of my own concert by accident. She's wearing a suit at a rock show, searching for her lost law school textbook, has no idea who I am, and for the first time in years, I'm hooked. She's smart, driven, and utterly gorgeous. The sort of girl who earnestly believes in following the rules and hates when others don't. I'm a huge rock star, recovering addict, and general f--kup. Our relationship is for show and that's all. But with every smile, every laugh, and every breathtaking glance at her curves, I want her more.

Remember how many lies we told, Molly? It’s enough to make my head spin. You were wild when I met you, and I was mad for you. But then something happened. And now you’re gone. But don’t worry. I’ll find you. I just need to sift through the story of us to get to where you might be. I’ve got places to look and a list of names. The police have a list of names, too. See now? There’s another lie. There is only one person they’re really looking at, Molly. And that’s yours truly.