Title: Mister Monday
Author: Garth Nix
SF J NIX
Arthur Penhaligon is supposed to die at a young age, but is saved by a key that is shaped like the minute hand of a clock. The key causes bizarre creatures to come from another realm, bringing with them a plague. A man named Mister Monday will stop at nothing to get the key back. Arthur goes to a mysterious house that only he can see, so that he can learn the truth about himself and the key.
Seven days. Seven keys. Seven virtues. Seven sins. One mysterious house is the doorway to a very mysterious world—where one boy is about to venture and unlock a number of fantastical secrets.
This is another thrilling, triumphantly imaginative series from Garth Nix, the best-selling author of The Seventh Tower, Sabriel, and Lirael.