Lyman Frank Baum was an American author best known for his children's fantasy books, particularly The Wonderful Wizard of Oz, part of a series. In addition to the 14 Oz books, Baum penned 41 other novels, 83 short stories, over 200 poems, and at least 42 scripts. He made numerous attempts to bring his works to the stage and screen; the 1939 adaptation of the first Oz book became a landmark of 20th-century cinema.
Baum, c. 1911
Young Baum in the Peekskill Military Academy
Promotional Poster for Baum's "Popular Books For Children", c. 1901
1903 poster of Dave Montgomery as the Tin Man in Hamlin's musical stage version.
Children's fantasy is children's literature with fantasy elements: fantasy intended for young readers. It may also mean fantasy read by children, regardless of the intended audience.
Illustration from first edition of The Wonderful Wizard of Oz