Mike McClintock is the author of the Beginner Books classics Stop That Ball! and A Fly Went by, which was edited by Dr. Seuss.
Fritz Siebel was born in 1913 in Vienna, Austria. He studied illustration at the Kunstgewerbeschule in Vienna and immigrated to the United States in 1936, where he served in the US Army during World War II. In America, he worked on movie posters for Paramount Pictures. His most well-known poster was an entry in a national competition to create a warning to protect national security. His entry was the famous "Someone Talked" poster, which has won numerous awards. Siebel began to find work in advertising agencies and magazines, illustrating for Colliers, Holiday, and the Saturday Evening Post, and creating the now iconic advertising character Mr. Clean. He provided the illustrations for A Fly Went By with Beginner Books at Random House in 1959. He died in 1991.