 The cover for the first issue, by Jno Ruger, showed a detective using an electronic device to measure the reactions of a suspect.Later issues included stories by some writers who either were already well known to readers of science fiction or would soon become so, including Lloyd Arthur Eshbach, David H. Keller, Ed Earl Repp, Neil R. Jones, and Edmond Hamilton, though even these stories were not always science fiction.Hamilton's "The Invisible Master", for example, describes a way to become invisible, but at the end of the story the science is revealed to be a hoax, and the story is straightforward detective fiction.