It's been one year since the brutal murder of her older sister, Zoë, and fifteen-year-old Echo is still reeling from the aftermath. Her parents are numb, her friends are moving on, and the awkward start to her freshman year proves she'll never live up to her sister's memory. Until Zoë's former boyfriend Marc shows up with Zoë's diary. At first Echo's not interested, doubting there's anything in there she doesn't already know. But when curiosity prevails, she starts reading, becoming so immersed in her sister's secret world, their lives begin to blur.

Belly measures her life in summers. Everything good, everything magical happens between the months of June and August. Winters are simply a time to count the weeks until the next summer, a place away from the beach house, away from Susannah, and most importantly, away from Jeremiah and Conrad. They are the boys that Belly has known since her very first summer—they have been her brother figures, her crushes, and everything in between. But one summer, one wonderful and terrible summer, the more everything changes, the more it all ends up just the way it should have been all along.

You know, being friends with two cute boys does have its benefits. There's Danny. Danny is a golden boy in every way. He has dreamy blue eyes and blonde hair that always looks perfect, even when it's windblown or been stuck under a football helmet. He's the boy every girl crushes on. The boy I get into trouble with, the boy I fight with, the hot quarterback no girl can resist, not even me. Being with Danny is like being on an adventure. He has a bright, contagious smile and abs to die for. He's pretty much irresistible.

Sixteen-year-old Lara Jean Song keeps her love letters in a hatbox her mother gave her. They aren’t love letters that anyone else wrote for her; these are ones she’s written. One for every boy she’s ever loved - five in all. When she writes, she pours out her heart and soul and says all the things she would never say in real life, because her letters are for her eyes only. Until the day her secret letters are mailed, and suddenly, Lara Jean’s love life goes from imaginary to out of control.

James and Alex have barely anything in common anymore - least of all their experiences in high school, where James is a popular senior and Alex is suddenly an outcast. But at home, there is Henry, the precocious 10-year-old across the street, who eagerly befriends them both. And when Alex takes up running, there is James’s friend Nathen, who unites the brothers in moving and unexpected ways.

Sixteen-year-old Sana Kiyohara has too many secrets. Some are small, like how it bothers her when her friends don't invite her to parties. Some are big, like the fact that her father may be having an affair. And then there's the one that she can barely even admit to herself - the one about how she might have a crush on her best friend. When Sana and her family move to California, she begins to wonder if it's finally time for some honesty, especially after she meets Jamie Ramirez.

Judy Lohden is your above-average 16-year-old: sarcastic and vulnerable, talented and uncertain, full of big dreams for a big future. With a singing voice that can shake an auditorium, she should be the star of Darcy Arts Academy, the local performing-arts high school. So why is a girl this promising hiding out in a seedy motel room on the edge of town?

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 .

When Nico Morris' older sister mysteriously disappears, her parents, family, and friends are devastated. But Nico can never admit what she herself feels: relief at finally being free of Sarah's daily cruelties. Then the best and worst thing happens: four years later, after dozens of false leads, Sarah is found. But this girl is much changed from the one Nico knew. She's thin and drawn when Sarah had been golden and athletic; timid and unsure instead of brash and competitive; and, strangest of all, sweet and kind when she had once been mean and abusive.

When Jade is given a scholarship to an elite private college in Connecticut, she sees it as a chance to finally escape her painful past and get a fresh start. She’s determined to succeed and that means keeping her focus on school and not guys. But that plan falls apart her first day on campus when Garret, a wealthy prep school boy with swimmer abs and a perfect smile, offers to help her move in. Jade tries to push him away but she can’t deny her attraction to him and Garret won’t let her.

Everyone knows how all those fairy tales go. The princess gets beautiful, nabs her prince, falls instantly in love, lives happily ever after and leaves her evil stepsisters in the dust. But what happens when you're the ugly stepsister and your obnoxiously perfect - read pretty, smart, and, worst of all, sickeningly nice - stepsister is dating the charming, tall, devastatingly handsome guy you've had a thing for since you were nine years old? Quirky, artistic and snarky Mattie Lowe does not lead a charmed life. Her mother is constantly belittling her on Skype.

Everyone knows Alice slept with two guys at one party. When Healy High star quarterback Brandon Fitzsimmons dies in a car crash, it was because he was sexting with Alice. Ask anybody. Rumor has it Alice Franklin is a slut. It's written all over the "slut stall" in the girls' bathroom: "Alice had sex in exchange for math test answers" and "Alice got an abortion last semester." After Brandon dies, the rumors start to spiral out of control.

Keatyn has everything she ever dreamed. Her life is following the script she wrote for the perfect high school experience. She's popular, goes to the best parties, dates the hottest guy, and sits at the most-coveted lunch table.

Jack has a lot of sex - and he's not ashamed of it. While he's sometimes ostracized and gossip constantly rages about his sex life, Jack always believes that "it could be worse". But then, the worse unexpectedly strikes: When Jack starts writing a teen sex-advice column for an online site, he begins to receive creepy and threatening love letters that attempt to force Jack to curb his sexuality and personality. Now, it's up to Jack and his best friends to uncover the stalker - before their love becomes dangerous.

It happens every year. A list is posted, and one girl from each grade is chosen as the prettiest, and another is chosen as the ugliest. Nobody knows who makes the list. It almost doesn't matter. The damage is done the minute it goes up.This is the story of eight girls, freshman to senior, "pretty" and "ugly." And it's also the story of how we see ourselves, and how other people see us, and the tangled connection of the two.