If you are looking for a thrilling fantasy book, I recommend that you read the series of books The Keys to the Kingdom by Garth Nix. This mysterious novel is about a boy called Arthur Penhaligon who is not supposed to be a hero; he is in fact, supposed to die an early death. But his life is saved by a minute hand shaped key. Arthur is safe. but his world is in danger. Along with the key comes a plague brought by creatures from another realm. A villain, his messenger with blood stained wings, and an army of dog faced creatures will do anything to get the key back, even if it means destroying Arthur and everything that surrounds him. Desperate to save his world, Arthur ventures into a mysterious house that only he can see. In this house, Arthur will have to unravel the key's secrets and discover his true fate
Along with the key comes a plague brought by creatures from another realm