| 0 | - | cover | 0 | pencils: Alex Schomburg; inks: Alex Schomburg | Jim Hammond, Human Torch, Namor, Thomas Raymond, Sub-Mariner, Toro |
| 1 | Sincerely, Prince Namor the Sub-Mariner | illustration | 1 | pencils: Bill Everett; inks: Bill Everett | Sub-Mariner |
| 2 | Credits / Contents | table of contents | 2 | letters: typeset | |
| 3 | Introduction | foreword, introduction, preface, afterword | 3 | script: Roy Thomas | |
| 4 | Marvel Mystery Comics #21 | cover reprint (on interior page) | 1 | pencils: Alex Schomburg; inks: Alex Schomburg | Human Torch [Jim Hammond]; Toro [Thomas Raymond] |
| 5 | Big, All New Smashing Comic Book | promo (ad from the publisher) | 1 | letters: typeset | Human Torch [Jim Hammond]; Toro [Thomas Raymond]; Captain America [Steve Rogers]; Bucky [Bucky Barnes]; Sub-Mariner [Namor]; Black Marvel [Daniel Lyons]; Angel [Tom Halloway] |
| 6 | The Idol of Death | comic story | 15 | script: Carl Burgos; pencils: Carl Burgos; inks: Carl Burgos | Human Torch [Jim Hammond]; Toro [Thomas Raymond]; Mr. Nelson; Mr. Morrison; Prince Itor; Nalda; Crowley; Jarvis |
| 7 | A Sneak Preview of One of the Many Exciting Stories from--Captain America Comics | promo (ad from the publisher) | 1 | script: Jack Kirby, Joe Simon; pencils: Jack Kirby, Jack Kirby, Joe Simon; inks: Syd Shores, Joe Simon | Captain America [Steve Rogers]; Bucky [Bucky Barnes]; Ringmaster |
| 8 | The Magnetic Lake Mystery | comic story | 12 | script: Bill Everett; pencils: Bill Everett | Sub-Mariner [Namor]; Betty Dean; Captain Fritz Wiener |
| 9 | The Case of the Transport Crashes! | comic story | 7 | script: Ray Gill; pencils: Bob Oksner; inks: Bob Oksner | Terry Vance; Dr. Watson; Deadline Dawson; Major Dahl; Miss Dahl |
| 10 | The Story Behind the Cover | text story | 2 | script: Stan Lee; pencils: Carl Burgos | Human Torch [Jim Hammond]; Toro [Thomas Raymond]; Mr. Dymopolis |
| 11 | Danger Ahead | comic story | 5 | script: Ray Gill; pencils: Art Gates; inks: Art Gates | Patriot [Jeffrey Mace]; Mary; Casey; Lt. Heinrich Von Betz |
| 12 | Fight Against the Fascists | comic story | 6 | pencils: Ben Thompson | Ka-Zar [David Rand] |
| 13 | The Sabotaged Schoolhouse | comic story | 7 | pencils: Jack Kirby, Al Avison; inks: Joe Simon; letters: Howard Ferguson | Vision [Aarkus]; Senator Reeves; Colgan; Paget |
| 14 | The Weird Ghost of Amber Swamps | comic story | 9 | script: Paul Gustavson; pencils: Paul Gustavson; inks: Paul Gustavson; letters: Paul Gustavson | The Angel [Tom Halloway]; C. J. Miller |
| 15 | Sincerely, Prince Namor the Sub-Mariner | illustration | 1 | pencils: Bill Everett; inks: Bill Everett | Sub-Mariner [Namor] |
| 16 | Marvel Mystery Comics #22 | cover reprint (on interior page) | 1 | pencils: Alex Schomburg; inks: Alex Schomburg | Human Torch [Jim Hammond]; Toro [Thomas Raymond]; Sub-Mariner [Namor] |
| 17 | Now on Sale. The Two New Smashing Comic Magazine Sensations | promo (ad from the publisher) | 1 | pencils: Alex Schomburg, Jack Kirby; inks: Alex Schomburg, Joe Simon | Defender [Don Stevens]; Human Torch [Jim Hammond]; Toro [Thomas Raymond]; Sub-Mariner [Namor]; Angel [Tom Halloway]; Captain America [Steve Rogers]; Bucky [Bucky Barnes]; Black Marvel [Daniel Lyons] |
| 18 | The Invasion of Alslavia | comic story | 15 | script: Carl Burgos; pencils: Carl Burgos | Human Torch [Jim Hammond]; Toro [Thomas Raymond]; Kapula; Sahlous; Eric |
| 19 | Namor's Flying Bantam Car | comic story | 12 | script: Bill Everett; pencils: Bill Everett; inks: Bill Everett; letters: Bill Everett | Sub-Mariner [Namor]; Tony; Herr Krauss; Wilhelm; Paul |
| 20 | The Nazis' Death Gas | comic story | 6 | pencils: Ben Thompson; inks: Ben Thompson | Ka-Zar [David Rand] |
| 21 | The Strange Case of Captain America and the Hangman: Who Killed Doctor Vardoff | promo (ad from the publisher) | 2 | script: Jack Kirby, Joe Simon; pencils: Jack Kirby, Jack Kirby, Joe Simon; inks: Joe Simon, Jack Kirby | Captain America [Steve Rogers]; Bucky [Bucky Barnes]; Monocle; Hangman [Dr. Nicolai Vardoff] |
| 22 | The Mystery of the Phantom Killer | comic story | 7 | script: Ray Gill; pencils: Bob Oksner; inks: Bob Oksner | Terry Vance; Dr. Watson; Deadline Dawson; Clancy |
| 23 | - | comic story | 5 | script: Ray Gill; pencils: Alan Mandel; inks: Alan Mandel | Patriot [Jeffrey Mace]; Casey; Smitty |
| 24 | Dunkirk Incident | text story | 2 | script: Stan Lee; pencils: Harry Ramsey; inks: Harry Ramsey | Human Torch [Jim Hammond]; Toro [Thomas Raymond]; Sub-Mariner [Namor] |
| 25 | Khor, the Black Sorceror | comic story | 5.5 | pencils: Al Avison; letters: Howard Ferguson | Vision [Aarkus]; Black Sorcerer [Khor] |
| 26 | Special Offer for readers of Marvel Comics | promo (ad from the publisher) | 0.5 | | Captain America; Bucky |
| 27 | The Revenge of Sphinx Henchel | comic story | 9 | pencils: Al Gabriele; inks: Al Avison, Chu F. Hing | The Angel [Tom Halloway]; Judge Lind; Henry Van Horn; Sphinx Henchel (villain); Nick (villain); Trigger (villain) |
| 28 | Marvel Mystery Comics #23 | cover reprint (on interior page) | 1 | pencils: Alex Schomburg; inks: Alex Schomburg | Human Torch [Jim Hammond]; Toro [Thomas Raymond]; Sub-Mariner [Namor] |
| 29 | Big New Sub-Mariner No. 2 | promo (ad from the publisher) | 1 | pencils: Alex Schomburg; inks: Alex Schomburg | Sub-Mariner [Namor]; Angel [Tom Halloway] |
| 30 | Highway of Mystery | comic story | 15 | script: Carl Burgos; pencils: Carl Burgos; inks: Carl Burgos | Human Torch [Jim Hammond] Toro [Thomas Raymond]; Mr. Topper; Leader [N-4]; Sigmund; Rudolph |
| 31 | The Case of the Vanishing Convicts! | comic story | 12 | script: Bill Everett; pencils: Bill Everett; inks: Bill Everett; letters: Bill Everett | Sub-Mariner [Namor]; Prof. Dorn; Ramon Valerez; Black John; Mona Lake |
| 32 | Don't Miss the Next Big Issue of Captain America | promo (ad from the publisher) | 1 | letters: ?; typeset (some) | Human Torch [Jim Hammond]; Sub-Mariner [Namor]; Captain America [Steve Rogers]; Bucky [Bucky Barnes]; Joseph C. Yuhas (photo) |
| 33 | Swastika over Europe | comic story | 5 | script: Ray Gill; pencils: Alan Mandel; inks: Alan Mandel | Patriot [Jeffrey Mace]; Mary; Casey; Mr. Opperman; Howard |
| 34 | The Vision Speaks | text story | 2 | script: Stan Lee | Vision [Aarkus](origin); Law-Giver; Markham Ericsohn |
| 35 | Cult of the Shark-God | comic story | 7 | script: Joe Simon, Jack Kirby; pencils: Jack Kirby; inks: Joe Simon | Vision [Aarkus]; Kai-Mak |
| 36 | Neutralizing the Nazis | comic story | 6 | pencils: Ben Thompson; inks: Ben Thompson | Ka-Zar [David Rand] |
| 37 | The Mystery of the Green Diamond! | comic story | 7 | script: Ray Gill; pencils: Bob Oksner; inks: Bob Oksner | Terry Vance; Dr. Watson; Deadline Dawson; Mayor Brown; Mrs. Brown |
| 38 | Death on Inferno Isle | comic story | 9 | pencils: Alan Mandel; inks: Alan Mandel | The Angel [Tom Halloway]; Diane Mason; George Hill; Von Reiman (villain) |
| 39 | Read the Human Torch | promo (ad from the publisher) | 1 | pencils: Alex Schomburg; inks: Alex Schomburg | Human Torch [Jim Hammond]; Toro [Thomas Raymond]; Sub-Mariner [Namor] |
| 40 | Marvel Mystery Comics #24 | photo story | 1 | pencils: Alex Schomburg; inks: Alex Schomburg | Human Torch [Jim Hammond]; Toro [Thomas Raymond] |
| 41 | Back Comes the Dreaded Red Skull | promo (ad from the publisher) | 1 | | Captain America [Steve Rogers]; Bucky [Bucky Barnes]; Red Skull [Johann Schmidt] |
| 42 | Meet the Parrot | comic story | 15 | script: Carl Burgos; pencils: Carl Burgos; inks: Carl Burgos | Human Torch [Jim Hammond]; Toro [Thomas Raymond]; Warden Thomaz; Bob; Parrot; Culflam; Luther |
| 43 | The Young Allies Comics | promo (ad from the publisher) | 1 | pencils: Bill King, Jack Kirby; inks: Bill King, Syd Shores | Bucky [Bucky Barnes]; Toro [Thomas Raymond]; Whitewash Jones; Washington Vanderbilt Jefferson; "Knuckles" Percy Bartwell; Henry "Tubby" Tinkle; Red Skull [Johann Schmidt]; Adolf Hitler |
| 44 | Battles the Undersea Blitzkrieg! | comic story | 12 | script: Bill Everett; pencils: Bill Everett; inks: Bill Everett | Sub-Mariner [Namor]; Dorma; Princess Fen; Simma; Daka; Lt. Geeresse; Lonu-Ne |
| 45 | Mystery in the Maine Woods | comic story | 7 | script: Ray Gill; pencils: Bob Oksner; inks: Bob Oksner | Terry Vance; Dr. Watson; Deadline Dawson; Bull Dawson; Jeff Cramer |
| 46 | Who Robbed the Carter Bank?, or, How Good a Detective Are You? | text story | 2 | script: Stan Lee; pencils: Bob Oksner; inks: Bob Oksner | Terry Vance; Dr. Watson; Deadline Dawson; Hi Smithers; Police Commissioner Henderson; Lieutenant Jackson; Charlie Biswell; Jake Walters; Lemuel Carter |
| 47 | The German Peacemonger | comic story | 5 | pencils: Sid Greene; inks: Sid Greene | Patriot [Jeffrey Mace]; Casey; Fritz; Herr Huss; John Garrett |
| 48 | The Stronghold of Ali Hamud | comic story | 6 | pencils: Ben Thompson; inks: Ben Thompson | Ka-Zar [David Rand]; Ali Hamud; Capt. Ollendorff |
| 49 | Grosso of the War-Dust World | comic story | 7 | script: Joe Simon, Jack Kirby; pencils: Jack Kirby; inks: Al Avison | Vision [Aarkus]; Grosso |
| 50 | The Eye Thief | comic story | 9 | pencils: Alan Mandel; inks: Alan Mandel | The Angel [Tom Halloway]; Mr. Blakely; Mr. Keene; Dr. Hyde (villain) |
| 51 | The Great New Comic Magazine You Demanded! | promo (ad from the publisher) | 1 | pencils: Alex Schomburg; inks: Alex Schomburg | Sub-Mariner [Namor]; Angel [Tom Halloway] |
| 52 | Marvel Mystery Comics #21 House Ad from Captain America Comics #5 | promo (ad from the publisher) | 0.5 | | |
| 53 | Marvel Mystery Comics #19 House Ads from All Winners Comics #1 and Young Allies #1 | promo (ad from the publisher) | 0.5 | | |
| 54 | Marvel Mystery Comics #23 House Ad from Captain America Comics #6 | promo (ad from the publisher) | 1 | | |