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.

Gracie has never felt like this before. One day, she suddenly can't breathe, can't walk, can't anything - and the reason is standing right there in front of her, all tall and weirdly good-looking: A. J. But it turns out A. J. likes not Gracie but Gracie's beautiful best friend, Sienna. Obviously Gracie is happy for Sienna. Super happy! She helps Sienna compose the best texts, responding to A. J.'s surprisingly funny and appealing texts, just as if she were Sienna. Because Gracie is fine. Always! She's had lots of practice being the sidekick, second best.

Sixteen-year-old Izzy is used to keeping her thoughts to herself - in school, where her boyfriend does the talking for her, and at home, where it’s impossible to compete with her older siblings and high-powered parents. When she mistakenly walks into a stand-up comedy club and performs, the experience is surprisingly cathartic. After the show, she meets Mo, an aspiring comic who’s everything Izzy’s not: bold, confident, comfortable in her skin. Mo invites Izzy to join her group of friends and introduces her to the Chicago open mic scene.

As a third-year PhD candidate, Olive Smith doesn't believe in lasting romantic relationships—but her best friend does, and that's what got her into this situation. Convincing Anh that Olive is dating and well on her way to a happily ever after was always going to take more than hand-wavy Jedi mind tricks: Scientists require proof. So, like any self-respecting biologist, Olive panics and kisses the first man she sees.

The many lives of theoretical physicist Elsie Hannaway have finally caught up with her. By day, she’s an adjunct professor, toiling away at grading labs and teaching thermodynamics in the hopes of landing tenure. By other day, Elsie makes up for her non-existent paycheck by offering her services as a fake girlfriend, tapping into her expertly honed people-pleasing skills to embody whichever version of herself the client needs. Honestly, it’s a pretty sweet gig—until her carefully constructed Elsie-verse comes crashing down.

Way up in the Swiss mountains, there's an old grand hotel steeped in tradition and faded splendor. Once a year, when the famous New Year's Eve Ball takes place and guests from all over the world arrive, excitement returns to the vast hallways. Sophie, who works at the hotel as an intern, is busy making sure that everything goes according to plan.

Sixteen-year-old Tessa Johnson has never felt like the protagonist in her own life. She’s rarely seen herself reflected in the pages of the romance novels she loves. The only place she’s a true leading lady is in the swoony love stories she shares only with Caroline, her best friend. When Tessa is accepted into the creative writing program of a prestigious art school, she’s excited to finally let her stories shine. But when she goes to her first workshop, the words are just...gone. Caroline has a solution: Tessa needs to find some inspiration in a real-life love story of her own.

Contrary to popular belief, best friends Kate Garfield and Anderson Walker are not codependent. Carpooling to and from theater rehearsals? Environmentally sound and efficient. Consulting each other on every single life decision? Basic good judgment. Pining for the same guys from afar? Shared crushes are more fun anyway. But when Kate and Andy's latest long-distance crush shows up at their school, everything goes off-script. Matt Olsson is talented and sweet, and Kate likes him. She really likes him. The only problem? So does Anderson.

Hunter never expected to be a boy band star, but, well, here he is. He and his band Kiss & Tell are on their first major tour of North America, playing arenas all over the United States and Canada (and getting covered by the gossipy press all over North America as well). Hunter is the only gay member of the band, and he just had a very painful breakup with his first boyfriend—leaked sexts, public heartbreak, and all—and now everyone expects him to play the perfect queer role model for teens.

Sixteen-year-old and not-so-openly gay Simon Spier prefers to save his drama for the school musical. But when an email falls into the wrong hands, his secret is at risk of being thrust into the spotlight. Now Simon is actually being blackmailed: If he doesn't play wingman for class clown Martin, his sexual identity will become everyone's business. Worse, the privacy of Blue, the pen name of the boy he's been emailing with, will be compromised.

The first thing I noticed about C.J. Gorman was his plexiglass bra. So begins Destination Unknown—it's 1987 in New York City, and Micah is at a dance club, trying to pretend he's more out and outgoing than he really is. C.J. isn't just out—he’s complete out there, and Micah can't help but be both attracted to and afraid of someone who travels so loudly and proudly through the night. A connection occurs. Is it friendship? Romance? Is C.J. the one with all the answers... or does Micah bring more to the relationship that it first seems?

When Claudia accidentally eavesdrops on the epic breakup of Paige and Iris, the it-couple at her school, she finds herself in hot water with prickly, difficult Iris. Thrown together against their will in the class production of A Midsummer Night's Dream, along with the goofiest, cutest boy Claudia has ever known, Iris and Claudia are in for an eye-opening senior year.

Lili drops a tiny queer bombshell: she's told all her college friends that Imogen and Lili used to date. And none of them know that Imogen is a raging hetero—not even Lili’s best friend, Tessa. Of course, the more time Imogen spends with chaotic, freckle-faced Tessa, the more she starts to wonder if her truth was ever all that straight to begin with. . .

It starts before you can even remember: You learn the rules for being a girl.... Marin has always been good at navigating these unspoken guidelines. A star student and editor of the school paper, she dreams of getting into Brown University. Marin’s future seems bright - and her young, charismatic English teacher, Mr. Beckett, is always quick to admire her writing and talk books with her. But when “Bex” takes things too far and comes on to Marin, she’s shocked and horrified. Had she somehow led him on? Was it her fault?

Jamie Goldberg is cool with volunteering for his local state senate candidate - as long as he’s behind the scenes. When it comes to speaking to strangers (or, let’s face it, speaking at all to almost anyone) Jamie’s a choke artist. There’s no way he’d ever knock on doors to ask people for their votes...until he meets Maya. Maya Rehman’s having the worst Ramadan ever. Why her mother thinks the solution to her problems is political canvassing - with some awkward dude she hardly knows - is beyond her.