Jack Gantos
American author of children's books (born 1951)
Jack Gantos is an American author of children's books. He is best known for the fictional characters Rotten Ralph and Joey Pigza. Rotten Ralph is a cat who stars in twenty picture books written by Gantos and illustrated by Nicole Rubel from 1976 to 2014. Joey Pigza is a boy with attention-deficit hyperactivity disorder (ADHD), featured in five novels from 1998 to 2014.
via WikipediaBooks (16)

Back to School for Rotten Ralph

Hole in My Life
Jack on the Tracks
Jack's Black Book
Jack's New Power

Joey Pigza loses control
Joey Pigza Swallowed the Key

Practice Makes Perfect for Rotten Ralph

Rotten Ralph Feels Rotten (Rotten Ralph)

Rotten Ralph Helps Out

Rotten Ralph's Rotten Christmas

Rotten Ralph's Rotten Romance

Rotten Ralph's Show and Tell

Rotten Ralph's trick or treat!

What Would Joey Do?

Worse than rotten, Ralph