Otherland — Louie Stowell

Otherland is a dangerous magical underworld - a place where appearances can be deceiving and anything can happen. A world of gods, vampires, and fairies. It's also... horrible.When life-long friends Myra and Rohan discover that Rohan's baby sister Shilpa has been stolen and taken to Otherland, the only way to rescue her is by taking part in a deadly game - three impossible challenges set by the Fairy Queen of Otherland. Win the game, and Rohan and Myra can go home with Shilpa - but lose, and they'll be trapped in Otherland forever...A darkly funny, action-packed fantasy adventure, perfect for fans of Malamander, Stranger Things, Coraline and Pan's Labyrinth, from the author of the highly-acclaimed Dragon in the Library series.