Never make a Grumph Angry (Hardcover) (ISBN-13: 9798886405934)

Having a child is definitely a source of inspiration. Prior to the birth of his son Ronald Citron had never written a book for children. His creative efforts were dedicated to writing music and playing improvisations on the piano. When his son reached the age of three, Citron felt the inspiration to write a book specifically for him and Never Make a Grumph Angry came into existence.