Seven days. Seven keys. Seven virtues - and seven sins. The moment Arthur meets sinister Mister Monday, the world turns inside out. The next seven days will bring seven fearful challenges - and a billion grisly ways to die. As his world is attacked by a plague of hellish creatures, Arthur retreats into a mysterious house , a house that only he can see. Inside, unlikely hero Arthur must unravel the secrets of the Seven Keys, battling monsters and treacherous Denizens in a bid to save his world... From bestselling author Garth Nix, this surreal and stunning fantasy series will hold you mesmerised. Titles included in this set are - 1. Mister Monday, 2. Grim Tuesday, 3. Drowned Wednesday, 4. Sir Thursday, 5. Lady Friday, 6. Superior Saturday, 7. Lord Sunday