Jean F. (stampsarefun) reviewed The Case of the Million-Dollar Mystery (Jigsaw Jones, Super Special, Bk 2) on + 597 more book reviews
Jigsaw had this idea of how to invent somthing that you could hear other people talking when the door was closed. Someone stole the notebook that the idea was in and he has to figure out who did it. This is a fun chapter mystery that both of my children like to read these.