In 1941 Margaret Wise Brown was hired by Random House to ghost write three books for Osa Johnson.  note# 1

Wikipedia listing for Martin and Osa Johnson

In the first half of the 20th century an American couple, Martin and Osa Johnson—from Lincoln, Kansas and Chanute, Kansas, respectively—captured the public’s imagination through their films and books of adventure in exotic, faraway lands. Photographers, explorers, marketers, naturalists and authors, Martin and Osa studied the wildlife and peoples of East and Central Africa, the South Pacific Islands and British North Borneo. They explored then-unknown lands and brought back film footage and photographs, offering many Americans their first understanding of these distant lands.
Martin Johnson took part as a crew member and cook in Jack London’s 1907–1909 voyage across the Pacific aboard the Snark. After that, he started a traveling road show that toured the United States displaying photographs and artifacts collected on the voyage. He met Osa Leighty while passing through her hometown of Chanute, Kansas, and they married in May 1910.

For more information about the Johnson, please visit The Martin and Osa Johnson safari website

“Tarnish; Adventures of a Young Lion”

“Chicago: Wilcox & Follett; 1944

“Snowball; Adventures of a Young Gorilla”

“New York: Random House; 1942 

“Pantaloons; Adventures of a Baby Elephant”

New York: Random House; 1941