John Dennis Fitzgerald (February 3, 1906 – May 21, 1988) was an American author, most notable for The Great Brain series of children's books.
Journalism work became increasingly difficult to find so he took a job as a purchasing agent at a steel company for economic stability while he continued to write.
[5] On the strength of this success, he quit his job and moved to a mountain cabin in Colorado to attempt a career at writing novels.
Other about late nineteenth and early twentieth century Utah and written for an adult audience followed but he ended up moving to Denver and took a hiatus from creative writing for a short while.
Thus began his most well-known books, The Great Brain series, in which his characters are loosely based on people from his own family and community, including himself.