Book 1

Case of the Secret Sauce

by Aaron Rosenberg

Published 28 April 2011
When Pete and Penny's parents leave them with their uncle in charge of the family pizza parlor, they must solve a mystery after their secret sauce recipe is lost.

Book 3

After a bookstore opens next door to their parents' pizza shop, strange things begin to happen. Bookshelves collapse, the fire alarm goes off, and the books disappear. Is someone sabotaging the bookstore? And when a secret message appears in the wall between the two stores, can nine-year-old Pete and eleven-year-old Penny Pizzarelli crack the case?

Book 4