The Case of the Old Man in the Mailbox by Brian C. Jacobs
Approx. 44,530 words.
Published on July 10, 2012 by
Seattle Book Company.
When junior-high boys Tyler, Scooter, and AJ see an old man digging through Scooter’s mailbox, they put on their detective hats to find out why. But when the mystery of the old man becomes more complicated than they foresaw, it appears that this newly formed detective agency might not make it to their second case.