| 0 | - | cover | 2 | pencils: Walt Simonson; inks: Walt Simonson | Fin Fang Foom; The Glop; Groot; Sporr; X |
| 1 | Blank pages | blank page(s) | 2 | | |
| 2 | Monster Masterworks | foreword, introduction, preface, afterword | 1 | pencils: Vince Mielcarek; inks: Vince Mielcarek | |
| 3 | Monsters of the Shifty Fifties | foreword, introduction, preface, afterword | 1 | script: Jack Kirby | |
| 4 | Monster Masterworks | table of contents | 1 | pencils: Vince Mielcarek; inks: Vince Mielcarek | |
| 5 | Alien Invaders | foreword, introduction, preface, afterword | 1 | pencils: Vince Mielcarek; inks: Vince Mielcarek | |
| 6 | I Challenged...Groot! The Monster from Planet X! | comic story | 7 | script: Stan Lee; pencils: Jack Kirby; inks: Dick Ayers | Groot (introduction, origin); Leslie Evans; Alice Evans |
| 7 | The Threat of Tim Boo Ba | comic story | 5 | script: Stan Lee; pencils: Steve Ditko; inks: Steve Ditko | Tim Boo Ba |
| 8 | The Glop! | comic story | 12 | script: Stan Lee; pencils: Jack Kirby; inks: Dick Ayers | Glop |
| 9 | Taboo! The Thing From Murky Swamp! | comic story | 7 | pencils: Jack Kirby; inks: Dick Ayers | Lewis Conrad; Taboo (introduction, origin) |
| 10 | I Learned the Dread Secret of the Blip! | comic story | 7 | script: Stan Lee; pencils: Jack Kirby; inks: Dick Ayers | Blip |
| 11 | I Was Captured by the Creature from Krogarr! | comic story | 7 | script: Stan Lee; pencils: Jack Kirby; inks: Dick Ayers | Joe Hanson; Clara Hanson; Creature from Krogarr |
| 12 | A Martian Walks Among Us! | comic story | 7 | pencils: Jack Kirby; inks: Dick Ayers | |
| 13 | Man-Made Monsters | foreword, introduction, preface, afterword | 1 | pencils: Vince Mielcarek; inks: Vince Mielcarek | |
| 14 | What Was "X" The Thing That Lived! | comic story | 18 | script: Stan Lee; pencils: Jack Kirby; inks: Dick Ayers | Charles Bentley; X |
| 15 | Van Doom, the Man Who Made a Creature! | comic story | 13 | script: Stan Lee; pencils: Jack Kirby; inks: Dick Ayers | Ludwig Vandoom; Vandoom's Creature |
| 16 | Kraa the Unhuman | comic story | 13 | script: Stan Lee; pencils: Jack Kirby; inks: Dick Ayers | Kraa (intro) |
| 17 | I Am the Brute That Walks! | comic story | 12 | pencils: Jack Kirby; inks: Dick Ayers; letters: Artie Simek | "The Brute That Walks" [Howard Avery]; Sally Barton |
| 18 | Sporr! The Thing That Could Not Die! | comic story | 7 | script: Stan Lee; pencils: Jack Kirby; inks: Dick Ayers | Sporr |
| 19 | Zzutak: The Thing That Shouldn't Exist!! | comic story | 13 | pencils: Jack Kirby; inks: Steve Ditko | Frank Johnson (introduction); Yucoya-Tzin (introduction, not named); Zzutak (introduction, origin) |
| 20 | Ancient Menaces | foreword, introduction, preface, afterword | 1 | pencils: Vince Mielcarek; inks: Vince Mielcarek | |
| 21 | Fear in the Night | comic story | 5 | pencils: Steve Ditko; inks: Steve Ditko | Zenocian #7; Model Vog robot |
| 22 | Gigantus! The Monster That...Walked Like a Man! | comic story | 7 | script: Stan Lee, Larry Lieber; pencils: Jack Kirby; inks: Steve Ditko | Mr. Baxter; Charlie; Gigantus |
| 23 | Grottu, King of the Insects! | comic story | 6 | pencils: Jack Kirby; inks: Bill Everett | Frank [Ulysses Bloodstone] (earliest published appearance according to later continuity); Lynn Avery; Kasenga; Grottu (introduction, origin) |
| 24 | Titan, the Amphibian from Atlantis! | comic story | 7 | script: Larry Lieber, Stan Lee; pencils: Jack Kirby; inks: Dick Ayers, Russ Heath | John Cartwright; Titan |
| 25 | Fin Fang Foom! | comic story | 13 | pencils: Jack Kirby; inks: Dick Ayers | Fin Fang Foom (introduction); Chan Liuchow; Chung Liuchow |
| 26 | Cover - Where Monsters Dwell #15 | cover reprint (on interior page) | 1 | pencils: John Severin; inks: John Severin; letters: Morrie Kuramoto | Kraa |
| 27 | Cover - Where Monsters Dwell #35 | cover reprint (on interior page) | 1 | pencils: Jack Kirby; inks: Dick Ayers; letters: Artie Simek, Danny Crespi | Gorgolla |
| 28 | Cover - Where Monsters Dwell #21 | cover reprint (on interior page) | 1 | pencils: Jack Kirby; inks: Dick Ayers; letters: Artie Simek | Fin Fang Foom |
| 29 | Cover - Where Monsters Dwell #16 | cover reprint (on interior page) | 1 | pencils: Gil Kane; inks: Vince Colletta; letters: John Costanza | Googam |