InterWorld

InterWorld is a bestselling YA novel co-created by Neil Gaiman and Michael Reaves that follows Joey Harker, an ordinary boy who discovers his world is just one among a trillion alternate Earths, each with its own unique rules of magic and science. As he teams up with alternate versions of himself from different worlds, they must work together to confront powerful villains and maintain the balance across the multiverse. The story will appeal to fans of series like His Dark Materials and Harry Potter, with its adventurous blend of magic and science across countless worlds.