Writer identification by Martin O'Hearn. First full-length story in the history of Detective Comics.
Story across 24 pages in 3 parts of 7.67, 5.67 and 9.67 pages.
Information on Phobos, one of the two moons that orbit Mars.
On the page immediately following page 8 of the main story sequence.
Letters of comment from Douglas Marden, Britt Mayo, Joan Kassman and Vincent Stuart. Preview information on the next issue of Detective Comics.