At Carnival time in Southern Germany there is a tradition of revellers throwing sweets to those watching the parade of floats in the town's main street. All the children carry bags to collect goodies. This scenario inspired the story "Frank's Secret". Frank, the boy in the story, wants to collect more sweets than his older brothers. He is helped by a boy from outer space called Knarf, who takes Frank by spaceship to the parade. The visitor uses a strange language that Frank and the book's young readers want to decipher. This book could help the development of literacy.