15 Story Detective was originally All-Story Detective, which ran for only six issues before being rebranded and running another 9 before folding. It is unrelated to 15 Mystery Stories, which was originally Dime Mystery, and ran for 154 issues before being rebranded and folding only five issues later.
A Colorado Rancher Makes His Own Law!
This final issue was retitled from “The Mysterious Traveler Magazine” to “The Mysterious Traveler Mystery Reader”
This cover art does not actually correspond with any story featured in this issue. However, there was a contest where readers could send in an outline of a mystery story based on this issue’s cover art. Grand Prize: $50.00.