George Sullivan writes books of fact, history, and biography for children and young adults. He has more than one hundred titles to his credit. They cover a wide range of subjects, from auto racing to hydroponics, from civil engineering to the Civil War. Publishers Weekly said that Sullivan "has mastered the art of writing simply and directly, making complex subjects understandable and interesting." Photography and photographers have been the subjects of some of his recent books. His interest in photography goes beyond just writing about it. He sometimes takes the photographs that are used to illustrate his work. Recent books of his include: Knockout! A Photobiography of Joe Louis, Helen Keller: Her Life in Pictures, and Berenice Abbott, Photographer: An Independent Vision.
George Sullivan lives with his wife in New York City.