"Carry On" is a young adult fantasy novel by American author Rainbow Rowell, published in 2015. The novel is a spin-off from Rowell's previous novel "Fangirl" and features the fictional world of Simon Snow, a teenage wizard who attends the Watford School of Magicks in England. Simon is the "Chosen One" prophesied to save the world from the evil Humdrum, but he is struggling with his magical abilities and his complicated relationships with his friends and enemies. As Simon navigates his way through his final year at Watford, he must confront his own fears and weaknesses, and learn to trust himself and his abilities. The novel is a clever subversion of the tropes and conventions of the fantasy genre, as well as a nuanced exploration of themes of identity, love, and belonging. With its witty dialogue, engaging characters, and thrilling plot, "Carry On" is a beloved favorite among readers of young adult fiction.