| 0 | - | cover | 1 | pencils: Lou Fine; inks: Lou Fine | The Green Mask [Michael Shelby] |
| 1 | The Will of John D. Lovingston | comic story | 9 | script: Will Eisner; pencils: Walter Frame; inks: Walter Frame | The Green Mask [Michael Shelby]; Janette Lovingston (first appearance; villain; death) |
| 2 | The Robot Solar System | comic story | 6 | script: Dick Briefer; pencils: Dick Briefer; inks: Dick Briefer | Rex Dexter; A robot (villain, introduction) |
| 3 | Come! Come! | comic story | 2 | script: Fred Schwab; pencils: Fred Schwab; inks: Fred Schwab; letters: Fred Schwab | |
| 4 | River Lily and the Purr of Death | comic story | 6 | pencils: Cecilia Munson; inks: Cecilia Munson | VILLAINS: Chen Chang; River Lily |
| 5 | The World Race | comic story | 3 | pencils: Floyd Kelly; inks: Floyd Kelly | VILLAIN: Basil Rogers (Introduction) |
| 6 | Big-Shot Krard's Dope Ring | comic story | 5 | pencils: F. Klaus; inks: F. Klaus | VILLAINS: Dan Krard (Introduction); Miss Henner (Introduction) |
| 7 | The Case of Oil | comic story | 4 | script: Fred Schwab; pencils: Fred Schwab; inks: Fred Schwab; letters: Fred Schwab | Hemlock Shomes |
| 8 | Mr. Death | text story | 2 | script: Will Eisner; pencils: Will Eisner; inks: Will Eisner | Mystery Man [Richard Alden] (first appearance); Mr. Death (first appearance, villain) |
| 9 | - | comic story | 3 | pencils: Art Peddy; inks: Art Peddy | VILLAIN: Ki-Mung (Introduction) |
| 10 | A Trap For the Blue Beetle | comic story | 5 | script: Will Eisner; pencils: Charles Nicholas; inks: Charles Nicholas | The Blue Beetle [Dan Garrett]; Dr. Franz (first appearance) |
| 11 | Inspector Bancroft of Scotland Yard Smashes a Spy Ring | comic story | 4 | pencils: Art Pinajian; inks: Art Pinajian | Inspector Bancroft; Gobless (first appearance; villain) |
| 12 | The Revolt of Fahid-Akra | comic story | 6 | script: Bob Powell; pencils: Bob Powell; inks: Bob Powell | D-13 [Richard Anthony]; Fahid-Akra (first appearance, villain) |
| 13 | Tiger Hunt | comic story | 4 | pencils: John Lindermayer; inks: John Lindermayer | Denny Scott |
| 14 | Super Sleuths | comic story | 1 | script: Lee Harris | |
| 15 | Marooned At the South Pole | comic story | 4 | script: Will Eisner; pencils: Floyd Kelly; inks: Floyd Kelly | VILLAINS: The Walrus Men (Introduction) |
| 16 | - | promo (ad from the publisher) | 1 | | |