Charlie didn't think Nick could ever like him back, but now they're officially boyfriends. Charlie's beginning to feel ready to say those three little words: I love you. 
Nick's been feeling the same, but he's got a lot on his mind - not least coming out to his dad, and the fact that Charlie might have an eating disorder. 
As summer turns to autumn and a new school year begins, Charlie and Nick are about to learn a lot about what love means.
By Alice Oseman, winner of the YA Book Prize, Heartstopper is about love, friendship, loyalty and mental illness. It encompasses all the small moments of Nick and Charlie's lives that together make up something larger, which speaks to all of us.