To All the Boys I've Loved Before by Jenny Han

To All the Boys I've Loved Before is the story of Lara Jean, who has never openly admitted her crushes, but instead wrote each boy a letter about how she felt, sealed it, and hid it in a box under her bed.
But one day Lara Jean discovers that somehow her secret box of letters has been mailed, causing all her crushes from her past to confront her about the letters: her first kiss, the boy from summer camp, even her sister's ex-boyfriend, Josh.
As she learns to deal with her past loves face to face, Lara Jean discovers that something good may come out of these letters after all.

Since You've Been Gone by Morgan Matson

It was Sloane who yanked Emily out of her shell and made life 100% interesting. But right before what should have been the most epic summer, Sloane just…disappears. All she leaves behind is a to-do list

On it, thirteen Sloane-inspired tasks that Emily would normally never try. But what if they could bring her best friend back?

Apple picking at night? Okay, easy enough.

Dance until dawn? Sure. Why not?

Kiss a stranger? Um...

Emily now has this unexpected summer, and the help of Frank Porter (totally unexpected), to check things off Sloane's list. Who knows what she'll find?

Go skinny-dipping? Wait...what?

13 Little Blue Envelopes by Maureen Johnson

When Ginny receives thirteen little blue envelopes and instructions to buy a plane ticket to London, she knows something exciting is going to happen. What Ginny doesn't know is that she will have the adventure of her life and it will change her in more ways than one. Life and love are waiting for her across the Atlantic, and the thirteen little blue envelopes are the key to finding them in this funny, romantic, heartbreaking novel.

The Sisterhood of the Traveling Pants by Ann Brashares

Carmen got the jeans at a thrift shop. They didn't look all that great: they were worn, dirty, and speckled with bleach. On the night before she and her friends part for the summer, Carmen decides to toss them.
But Tibby says they're great. She'd love to have them. Lena and Bridget also think they're fabulous. Lena decides that they should all try them on. Whoever they fit best will get them.
Nobody knows why, but the pants fit everyone perfectly. Even Carmen (who never thinks she looks good in anything) thinks she looks good in the pants. Over a few bags of cheese puffs, they decide to form a sisterhood and take the vow of the Sisterhood of the Traveling Pants . . . the next morning, they say good-bye.
And then the journey of the pants — and the most memorable summer of their lives — begins.

Aristotle and Dante Discover the Secrets of the Universe by Benjamin Alire Saenz

Aristotle is an angry teen with a brother in prison. Dante is a know-it-all who has an unusual way of looking at the world. When the two meet at the swimming pool, they seem to have nothing in common. But as the loners start spending time together, they discover that they share a special friendship—the kind that changes lives and lasts a lifetime. And it is through this friendship that Ari and Dante will learn the most important truths about themselves and the kind of people they want to be