In the small town of Alcolu, South Carolina, in 1944, 12-year-old Ella spends her days fishing and running around with her best friend Henry and cousin Myrna. But life is not always so sunny for Ella, who gets bullied for her light skin tone, and whose mother is away pursuing a jazz singer dream in Boston. So Ella is ecstatic when her mother invites her to visit for Christmas. Little does she expect the truths she will discover about her mother, the father she never knew, and her family's most unlikely history.

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.

Clare and Henry have known each other since Clare was six and Henry was 36. They were married when Clare was 23 and Henry was 31. Impossible but true, because Henry is one of the first people diagnosed with Chrono-Displacement Disorder: periodically his genetic clock resets and he finds himself misplaced in time, pulled to moments of emotional gravity from his life, past and future. His disappearances are spontaneous, his experiences unpredictable, alternately harrowing and amusing.

Little River, New York, 1994: April Sawicki is living in a motorless motorhome that her father won in a poker game. Failing out of school, picking up shifts at a local diner, she’s left fending for herself in a town where she’s never quite felt at home. When she “borrows” her neighbor’s car to perform at an open mic night, she realizes her life could be much bigger than where she came from. After a fight with her dad, April packs her stuff and leaves for good, setting off on a journey to find a life that’s all hers.

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.

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.

Dubbed "Dumplin'" by her former beauty queen mom, Willowdean has always been at home in her own skin. Her thoughts on having the ultimate bikini body? Put a bikini on your body. With her all-American-beauty best friend, Ellen, by her side, things have always worked...until Will takes a job at Harpy's, the local fast-food joint. There she meets Private School Bo, a hot former jock. Will isn't surprised to find herself attracted to Bo. But she is surprised when he seems to like her back.

Lina is spending the summer in Tuscany, but she isn't in the mood for Italy's famous sunshine and fairy-tale landscape. She's only there because it was her mother's dying wish that she get to know her father. But what kind of father isn't around for 16 years? All Lina wants to do is get back home. But then Lina is given a journal that her mom had kept when she lived in Italy. Suddenly Lina's uncovering a magical world of secret romances, art, and hidden bakeries. A world that inspires Lina to follow in her mother's footsteps.

Eleven-year-old Isabella’s parents are divorced, so she has to switch lives every week: One week she’s Isabella with her dad, his girlfriend Anastasia, and her son, Darren, living in a fancy house where they are one of the only black families in the neighborhood. The next week she’s Izzy with her mom and her boyfriend, John-Mark, in a small, not-so-fancy house that she loves. Because of this, Isabella has always felt pulled between two worlds. And now that her parents are divorced, it seems their fights are even worse, and they’re always about her.

Amanda is reliving her 11th birthday over and over again - even the fight with her best friend, Leo. How can she fix everything and put the day behind her? Only time, friendship, and luck will tell.

Twelve-year-old Fern feels invisible. Her dad is forever planning how to boost business at the family restaurant. Her mom is constantly going off to meditate. Her sister, Sarah, who’s taking a year off after high school, is too busy finding ways not to work, and her brother Holden is totally focused on his new "friend". And then there’s Charlie: three years old, a "surprise" baby, and the center of everything. If it wasn’t for her friend Ran, there would be nowhere to turn. Ran is always calm, always positive.

Cameron Post feels a mix of guilt and relief when her parents die in a car accident. Their deaths mean they will never learn the truth she eventually comes to - that she's gay. Orphaned, Cameron comes to live with her old-fashioned grandmother and ultraconservative aunt Ruth. When she’s eventually outed, her aunt sends her to God’s Promise, a religious conversion camp that is supposed to “cure” her homosexuality. At the camp, Cameron comes face to face with the cost of denying her true identity.

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.

In the wake of her best friend Ingrid's suicide, Caitlin is left alone, struggling to find hope and answers. When she finds the journal Ingrid left behind for her, she begins a journey of understanding and broadening her horizons that leads her to new friendships and first love. Nina LaCour brings the changing seasons of Caitlin's first year without Ingrid to life with emotion, honesty, and captivating writing.

While her mother, aerobics queen Kiki Sparks, spends the summer touring Europe, 15-year-old Colie Sparks is stuck in sleepy Colby, North Carolina. But she's not complaining. For one thing, her Aunt Mira is a sweet, laid-back eccentric; for another, no one knows that back home in Charlotte Colie is seen as a formerly-fat "golf-course slut," the school scapegoat. Then, by fate or by accident, Colie lands a waitressing job, where she meets Morgan and Isabel.