Lyman Frank Baum (1856-1919) was born in Chittenango, New York. After trying many different professions, he turned tw York. After trying many different professions, he turned to writing for children at the age of 40. "The Wizard of Oz "o writing for children at the age of 40. "The Wizard of Oz "is the first and most popular of his fourteen Oz novels. is the first and most popular of his fourteen Oz novels.