Pete and Penny's pizza puzzles

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?.

Nine-year-old Pete and eleven-year-old Penny Pizzarelli help their friends, toy shop owners Rupert and Eliott Jest, solve puzzles as part of a contest at the annual toy fair, but someone is trying to stop them.

The circus is in town and Nine-year-old Pete and eleven-year-old Penny Pizzarelli are anxious to see it. But after a monkey shows up at the pizza shop with a coded message, the brother and sister uncover a circus crook. Can the two save the circus?.

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.

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?.