Jem Halliday is in Love with Her Best Friend.It doesn't matter that Kai is gay, or that he'll never look at her the same way she looks at him. Their friendship is all she needs. But when Kai is outed online by one of their classmates, he does the unthinkable: he commits suicide.Jem's world is shattered. All she has left of her best friend are twelve letters—one for each month of the year—he wrote her before he died. Kai's letters beg her not to investigate what happened, but Jem can't let it go. She needs to know who did this, and she'll stop at nothing to find the person responsible for Kai's death. One way or another, someone is going down. Someone is going to pay..."I haven't felt so much for a book since If I Stay by Gayle Forman."—Confessions of a Book Addict"Undone is a story that will stick with me for a long time."—Book Passion for Life