I recommend Jigsaw Jones: The Case of the Detective in Disguise because it is a wonderful book. You could learn different kinds of code in this book. In this story there are two situations that the detective and the friend have to find out about. This story is about this detective that was in disguise and the detective and his friend had to find out who kept on stealing the brownies at the friend's store. The other thing about the story is that there is a kid that thinks that he could try to find the person who stole a football. The person who stole the brownies was...