Problem on Mars

From Author Wars - https://authorwars.com/publications/problem-on-mars-673291.html

Overview:

Title: Problem on Mars
Author: Duncan Farnsworth
Year: 2018
Publisher: Roy Glashan's Library
Price: A$0.00
Binding: ebook
Type: Chapter Book
Title Reference: Problem on Mars
Notes: Cover & title page credited as "David Wright O'Brien writing as Duncan Farnsworth" Unpaginated ebook. Formats: HTML, EPUB. The source edition is Fantastic Adventures, August 1941. Also re-prints the contest to solve the riddle posed by the story as well as the answers to the contest from a later issue.