The Keys to the Kingdom is an excellent new series by Garth Nix - a series I cannot wait for the sequel too! To get the concept of the book, you kind of have to read it, really. When Arthur is suffering from a asthma attack, two men appear to him, and one gives him a key shaped like the minute hand of an old clock. After that day, he starts seeing a large house. He is followed by creatures called Fetchers. Also, a book appears to him that is very useful. When a disease breaks out, he finds that it is spread by the Fetchers. Arthur sets off into the house to find a way to save his world
Arthur sets off into the house to find a way to save his world