There are two sides to every love story. Even supernatural ones. This is the companion novel to David Levithan's unforgettable bestseller Every Day . Every day is the same for Rhiannon. She has convinced herself that she deserves her distant, moody boyfriend, Justin. She knows the rules: Don't be needy. Avoid upsetting him. Never get your hopes up. Then, out of the blue, they share a perfect day together - perfect, that is, until Justin doesn't remember anything about it. Confused, and yearning for another day as great as that one, Rhiannon starts to question everything. And that's when a stranger tells her that the Justin she spent that time with . wasn't Justin at all. Levithan's powerful novel explores the complexities of first love in a unique way that will captivate anybody who loved Rainbow Rowell's Eleanor & Park and Jandy Nelson's I'll Give You the Sun . David Levithan is the new York Times best-selling author of Boy Meets Boy and Marly's Ghost. He is also co-author with John Green of Will Grayson, Will Grayson. and with Rachel Cohn of Nick & Norah's Infinite Playlist. David's latest collaboration with Rachel, The Twelve Days of Dash and Lily, was picked by Zoella for her Book Club with WHSmiths. David is also a highly respected children's book editor, whose list includes many luminaries of children's literature, including Garth Nix, Libba Bray and Suzanne Collins. He lives and works in New York.