The Keys to the Kingdom: Grim Tuesday by Garth Nix

Grim Tuesday is the sequel to Mister Monday in The keys to the Kingdom series. Arthur has beat Monday but now Tuesday has gotten mad and now Arthur has to go back into the house and beat Tuesday, this time Arthur does not have his keys with him so he has almost no power and must figure out how to destroy Tuesday and save his family the denizens in the Far reaches and the lower part of the house. Arthur is one of my favorite characters because he gets to go to a new world and is brave and interesting. I always don`t know what Arthur is going to do next in the most dire situations. Grim Tuesday is a really cool villain because he is modern. like when he messes up the economy on earth to make Arthur`s family do bad in the economy.