I'm Better Lost

Jimmy is a thief, he has been for quite a while. How else are he and his sister going to make ends meet? One day, he steals the wrong item and almost gets them both caught, but there is more to the strange necklace than Jimmy thinks and soon being caught is the least of his worries. Now he has to deal with magic, ancient gods, one very grumpy deity, and on top of that he still has to go to high school!