by Garth Nix
This is the last book in the Keys to the Kingdom series and there are lots of surprises for Arthur! He has to fight against Superior Saturday, Lord Sunday, AND the Piper to try to restore the house before the Nothing takes over. Can Arthur find his way across the Incomparable Gardens to the seventh key, or will the house and his family on Earth be sucked into the Nothing? If you love great action books or fantasy, you should check this one out! The series starts with Mister Monday and continues with a book for each day of the week.