| 0 | - | cover | 0 | pencils: Ed Moritz; inks: Ed Moritz | |
| 1 | - | cover | 1 | | |
| 2 | Front Endpapers | illustration | 2 | pencils: Al Feldstein; inks: Al Feldstein | |
| 3 | Blank Page | blank page(s) | 1 | | |
| 4 | Half-Title | credits, title page | 1 | pencils: Ed Moritz; inks: Ed Moritz | |
| 5 | Frontispiece | illustration | 1 | pencils: Ed Moritz; inks: Ed Moritz | |
| 6 | Title Page | credits, title page | 1 | colors: ? (logo and background only); letters: typeset | |
| 7 | Indicia | credits, title page | 1 | letters: typeset | |
| 8 | Contents | table of contents | 1 | letters: typeset | |
| 9 | Snake Hovers Over Ghost | illustration | 1 | pencils: Fred Guardineer; inks: Fred Guardineer | |
| 10 | Under Forbidden Covers, Part 1 | foreword, introduction, preface, afterword | 3 | script: Bruce Jones | |
| 11 | - | illustration | 3 | pencils: Ed Moritz; inks: Ed Moritz | |
| 12 | - | cover reprint (on interior page) | 1 | pencils: Ed Moritz; inks: Ed Moritz | |
| 13 | To Our Readers | table of contents | 1 | script: Richard Hughes; pencils: Dan Gordon; inks: Dan Gordon; letters: Dan Gordon | |
| 14 | The Werewolf Strikes | comic story | 8 | script: Frank Belknap Long; pencils: Ed Moritz; inks: Ed Moritz; letters: Ed Hamilton | John Wilder; Pierre; Jacques; Barbara; Monahan |
| 15 | The Living Ghost | comic story | 12 | script: Frank Belknap Long; pencils: Fred Guardineer; inks: Fred Guardineer | Tony Brand; Gail Leslie; Jean; Ned; Dr. VanDyke; Malevo |
| 16 | Voodoo | comic story | 1 | pencils: King Ward; inks: King Ward; letters: Ed Hamilton | |
| 17 | The Painted Grave | text story | 1 | script: Frank Belknap Long; letters: Ed Hamilton | John Drake |
| 18 | It Walked by Night | comic story | 9 | script: Frank Belknap Long; pencils: Max Elkan; inks: Max Elkan | Squire Aram; Philip; Roger; Sylvia; John Tenant; Ken; Stephen Carew |
| 19 | The Cursed Pistol | comic story | 1 | pencils: Ed Moritz; inks: Ed Moritz | The Chevalier De Fraise |
| 20 | The Castle of Otranto | comic story | 7 | script: Frank Belknap Long, Horace Walpole; pencils: Al Ulmer; inks: Al Ulmer | Alfonso Otranto; Manfred; Isabella; Theodore (heir to Otranto Castle); Justin; Anne |
| 21 | The Horrible Toys | text story | 1 | letters: typeset | Jane; Jimmy; Mrs. Meek |
| 22 | The Vengeful Specter of Lord Tyrone | comic story | 2 | pencils: Ed Moritz; inks: Ed Moritz | Lord Tyrone; Lady Beresford; Dr. Herwood |
| 23 | Haunted House | comic story | 6 | script: Frank Belknap Long; pencils: King Ward; inks: King Ward | Fred Eager (detective); Benny Beaver (detective); Lorna Brent; Horace Brent (ghost); Fielding (crooked lawyer); Jones (crooked lawyer) |
| 25 | - | cover reprint (on interior page) | 1 | pencils: Ed Moritz; inks: Ed Moritz | |
| 27 | Kill, Puppets, Kill | comic story | 9 | script: Frank Belknap Long; inks: Ed Moritz | Turgot; Jeanne; Pierre; Gloria; Ralph Wellman |
| 28 | The Mermaid Mole | text story | 1 | letters: typeset | Tom Jenson; Steve Miller |
| 29 | Out of the Unknown | comic story | 10 | script: Frank Belknap Long; pencils: Ed Moritz; inks: Ed Moritz | Gail Leslie; Tony Brand; The Living Ghost; Dr. VanDyke; Professor Mavelli; The Dark Phantom |
| 30 | The Old Tower's Secret | comic story | 7 | script: Frank Belknap Long; pencils: Edmond Good; inks: Edmond Good | Douglas Drew (ghost-breaker); Henry Masters; Jane Masters; Carter; Robert; Andrew |
| 31 | The Haunted Hoard | text story | 1 | letters: typeset | Jimmy Severn; William Denning; Miss Scruggins |
| 32 | The Master's Hand | comic story | 9 | script: Frank Belknap Long; pencils: Max Elkan; inks: Max Elkan | Betty Saunders; Kees Van Ruyter |
| 33 | Phantom of the Seas | comic story | 8 | script: Frank Belknap Long; pencils: Paul Reinman; inks: Paul Reinman | Captain Wolfson; Orfeo; Stephen Knowles; Joan Knowles; Betty Knowles; Bobby Knowles |
| 34 | The Grim Lady of Raynham Hall | comic story | 2 | pencils: King Ward; inks: King Ward | Lady of Raynham Hall; Captain Frederick Marryatt; Sir Charles |
| 40 | - | cover reprint (on interior page) | 1 | inks: Ed Moritz | |
| 41 | Throw Up Your Hands! | promo (ad from the publisher) | 1 | pencils: Ed Moritz; inks: Ed Moritz | |
| 42 | The Witch-Cat of Salem | comic story | 7 | pencils: Ken Bald; inks: Pete Riss | Black Naomi; Adam Adams; Mr. Gates; Bob; Ann |
| 43 | By the Light of the Lantern | text story | 1 | letters: typeset | Martin Hall; Henry Travers |
| 44 | The Vampire Prowls! | comic story | 9 | pencils: Leonard Starr; inks: Leonard Starr | Junius B. Jethro; Ruth Morton; Bill; Larry Roberts |
| 45 | Celtic Superstitions | comic story | 1 | pencils: Ed Moritz | |
| 46 | The Specter of Little Dread House | comic story | 9 | pencils: Ed Moritz; inks: Ed Moritz | Luke; "Tiny Tim" Carver; De Scalo; Diana Trapella; Alice; Jim |
| 47 | Know What This Is, Reader? | promo (ad from the publisher) | 1 | letters: ?; typeset | |
| 48 | The Affair of the Ferrick Phantom | comic story | 7 | pencils: Ed Moritz; inks: Ed Moritz | Richard Ferrick; Vardis Nelson; David Ferrick; Emery Kent; Henry Loftus; R. V. Claton; Thomas R. Demby |
| 49 | The Empty House | text story | 1 | letters: typeset | Silk; Lefty; Pete; Slim McKee |
| 50 | King Charles | comic story | 2 | pencils: King Ward; inks: King Ward | King Charles; Kirke; Sir Edmund Varney; Lord Pembroke |
| 51 | The Creekmore Curse | comic story | 9 | pencils: Al Feldstein; inks: Al Feldstein | Dr. Gaunt; Debby; Rand; Mr. Andrews; Roger Barrow; Alexander Watkins; George Pryor |
| 55 | - | cover reprint (on interior page) | 1 | pencils: Ed Moritz; inks: Ed Moritz | |
| 56 | The American Comics Group! | promo (ad from the publisher) | 1 | | |
| 57 | Giants of the Unknown | comic story | 12 | pencils: Jon Blummer; inks: Jon Blummer | Tom Andrews; Betty; Edward Clinton; El-Rano; El-Clani |
| 58 | The Affair of Room 1313 | comic story | 7 | pencils: Ed Moritz; inks: Ed Moritz | John Abbott; Casper MacLeish; Ellen Rogers; Mr. Gregory |
| 59 | - | letters page | 1 | letters: typeset | |
| 60 | Back to Yesterday | comic story | 10 | pencils: Leonard Starr; inks: Leonard Starr | Joseph Lawrence; Roger Lawrence; Margaret Anders; Margaret Blythe |
| 61 | Specialist in Spooks | comic story | 6 | pencils: Charles Sultan; inks: Charles Sultan | Elliot O'Donnell; McKaye |
| 62 | St. Mary's Specter | comic story | 2 | pencils: Max Elkan; inks: Max Elkan | Johnson |
| 63 | Rescue Out of the Unknown | text story | 2 | letters: typeset | Lily LeBecque; George LeBecque |
| 64 | The Women Wore Black | comic story | 7 | pencils: Pete Riss; inks: Pete Riss | Jug Nason |
| 68 | Will Eisner | promo (ad from the publisher) | 1 | pencils: ? (spot illustrations); inks: ? (spot illustrations); letters: typeset | |
| 69 | Mac Raboy's Flash Gordon | promo (ad from the publisher) | 1 | pencils: Mac Raboy; inks: Mac Raboy | |
| 70 | Dark Horse Archives | promo (ad from the publisher) | 2 | pencils: various (cover thumbnails); inks: various (cover thumbnails); colors: various (cover thumbnails); letters: typeset | |
| 71 | Blackjacked and Pistol-Whipped | promo (ad from the publisher) | 1 | pencils: Pete Poplaski; inks: Pete Poplaski | |
| 72 | Blank Page | blank page(s) | 1 | | |
| 73 | Back Endpapers | illustration | 2 | pencils: Fred Guardineer; inks: Fred Guardineer | |
| 74 | Adventures into the Unknown | promo (ad from the publisher) | 1 | pencils: Ed Moritz; inks: Ed Moritz | |