Sammie McCoy is a girl with a plan: graduate at the top of her class and get out of her small town as soon as possible. Nothing will stand in her way - not even the rare genetic disorder the doctors say will slowly steal her memories and then her health. So the memory book is born: a journal written to Sammie's future self, so she can remember everything, from where she stashed her study guides to just how great it feels to have a best friend again.

Overworked and underappreciated, single mom Amy Byler needs a break. So when the guilt-ridden husband who abandoned her shows up and offers to take care of their kids for the summer, she accepts his offer and escapes rural Pennsylvania for New York City. Usually grounded and mild mannered, Amy finally lets her hair down in the city that never sleeps. She discovers a life filled with culture, sophistication, and - with a little encouragement from her friends - a few blind dates.

Do you want to be popular? Stephanie Landry does. That's why this year, she has a plan to get in with the It Crowd in no time flat. She's got a secret weapon: an old book called (what else?) How to Be Popular.

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?

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.

Cannie Shapiro never wanted to be famous. The smart, sharp, plus-sized pop culture reporter was perfectly content writitng about other people's lives in the pages of the Philadlphia Examiner. But the day she opened up a national women's magazine to find out that her ex-boyfriend has been chronicling their ex-sex life is the day her life changes forever.

She's just a New York City girl living with her artist mom. News flash: Dad is prince of Genovia. (So that's why a limo always meets her at the airport!) Downer: Dad can't have any more kids. (So no heir to the throne.) Shock of the century: Like it or not, Mia is prime princess material.

Thirteen-year-old Stewart is academically brilliant but socially clueless. Fourteen-year-old Ashley is the undisputed "it" girl in her class, but her grades stink. Their worlds are about to collide when Stewart and his dad move in with Ashley and her mom. Stewart is trying to be 89.9 percent happy about it, but Ashley is 110 percent horrified. She already has to hide the real reason her dad moved out; "Spewart" could further threaten her position at the top of the social ladder.

For Penny Lee high school was a total nonevent. Her friends were okay, her grades were fine, and while she somehow managed to land a boyfriend, he doesn't actually know anything about her. When Penny heads to college in Austin, Texas, to learn how to become a writer, it's 79 miles and a zillion light-years away from everything she can't wait to leave behind.

Leila has made it most of the way through Armstead Academy without having a crush on anyone, which is a relief. As an Iranian American, she’s different enough; if word got out that Leila liked girls, life would be twice as hard. But when beautiful new girl Saskia shows up, Leila starts to take risks she never thought she would.

Twelve-year-old Lucy Desberg is a natural problem solver. After the local homecoming queen shows up at her family's struggling drugstore with a beauty disaster that Lucy helps to fix, Lucy has a long line of makeover customers for every school dance and bat mitzvah. But all the makeup tips in the world won't help save the pharmacy. If only she could find a way to make the pharmacy the center of town again - a place where people want to spend time, like in the old days.

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?

Jen Dixon is not your typical Kansas City kindergarten class mom - or mom in general. Jen already has two college-age daughters by two different (probably) musicians, and it's her second time around the class mom block with five-year-old Max - this time with a husband and father by her side. Though her best friend and PTA president sees her as the "wisest" candidate for the job (or oldest), not all of the other parents agree.

Everything about Jessie is wrong. At least that's what it feels like during her first week of junior year at her new ultra-intimidating prep school in Los Angeles. Just when she's thinking about hightailing it back to Chicago, she gets an email from a person calling themselves Somebody/Nobody (SN for short), offering to help her navigate the wilds of Wood Valley High School. Is it an elaborate hoax? Or can she rely on SN for some much-needed help?

She doesn't want to go, but Em must chaperone her little sister to the grand opening of a new Stark Megastore. Her sister can't wait to see the heartthrobs and supermodels that will make an appearance, including hunky Gabriel Luna and beautiful Nikki Howard.