24 books • 5 series
Harold & Hog Pretend For Real ( Elephant & Piggie Like Reading ) (Elephant & Piggie Like Reading!, #6)
The Cookie Fiasco-Elephant & Piggie Like Reading! (Elephant & Piggie Like Reading!, #1)
Ricky Ricotta's Mighty Robot vs. the Unpleasant Penguins from Pluto (Ricky Ricotta, #9)