| 0 | - | cover | 1 | pencils: Jack Kirby; inks: Dick Ayers; colors: Paul Mounts | The X-Men [Professor X [Charles Xavier]; Cyclops [Scott Summers]; Beast [Hank McCoy]; Angel [Warren Worthington III]; Iceman [Bobby Drake]; Marvel Girl [Jean Grey]]; Sentinels |
| 1 | Epic Collection | promo (ad from the publisher) | 1 | pencils: Ron Frenz, Sal Buscema, George Tuska; inks: Brett Breeding, Sal Buscema, Pablo Marcos | Thor; Spider-Man [Peter Parker]; Iron Man [Tony Stark]; Black Widow [Natasha Romanoff] |
| 2 | X-Men: Children of the Atom | credits, title page | 1 | pencils: Jack Kirby; inks: Dick Ayers | The X-Men [Cyclops [Scott Summers]; Beast [Hank McCoy]; Angel [Warren Worthington III]; Iceman [Bobby Drake]; Marvel Girl [Jean Grey]]; Sentinels |
| 3 | Credits and Indicia | credits, title page | 1 | letters: typeset | |
| 4 | Table of Contents | table of contents | 1 | letters: typeset | |
| 5 | X-Men versus Magneto Earth’s Most Powerful Super Villain!! | cover reprint (on interior page) | 1 | pencils: Jack Kirby; inks: Sol Brodsky, Frank Giacoia; colors: Stan Goldberg; letters: Art Simek | The X-Men [Angel [Warren Worthington III]; Beast [Hank McCoy]; Cyclops [Scott Summers]; Iceman [Bobby Drake]; Marvel Girl [Jean Grey]]; Magneto [Erik Lehnsherr] |
| 6 | X-Men | comic story | 23 | script: Stan Lee; pencils: Jack Kirby; inks: Paul Reinman; letters: Sam Rosen | The X-Men [Professor X [Charles Xavier]; Cyclops [Scott Summers]; Beast [Hank McCoy]; Angel [Warren Worthington III]; Iceman [Bobby Drake]; Marvel Girl [Jean Grey]] (introduction for all); Magneto [Erik Lehnsherr] (introduction) |
| 7 | Nothing Can Stop the Vanisher! | cover reprint (on interior page) | 1 | pencils: Jack Kirby; inks: Paul Reinman; colors: Stan Goldberg; letters: Sam Rosen | The X-Men [Professor X; The Angel; The Beast; Cyclops; Marvel Girl [Jean Grey]; Iceman]; The Vanisher |
| 8 | No One Can Stop the Vanisher! | comic story | 22 | script: Stan Lee; pencils: Jack Kirby; inks: Paul Reinman; letters: Sam Rosen | The X-Men [Professor X; The Angel; The Beast; Cyclops; Marvel Girl [Jean Grey]; Iceman]; The Vanisher (first appearance); Fred Duncan (first appearance) |
| 9 | Beware of the Blob! | cover reprint (on interior page) | 1 | pencils: Jack Kirby; inks: Sol Brodsky; colors: Stan Goldberg; letters: Sam Rosen | The X-Men [The Angel; The Beast; Cyclops; Marvel Girl [Jean Grey]; Iceman]; The Blob |
| 10 | Beware of the Blob! | comic story | 24 | script: Stan Lee; pencils: Jack Kirby; inks: Paul Reinman; letters: Artie Simek | The X-Men [Professor X; The Angel; The Beast; Cyclops; Marvel Girl [Jean Grey]; Iceman]; The Blob (first appearance) |
| 11 | At Last!! The X-Men Come Face-to-Face with "The Brotherhood of Evil Mutants!" | cover reprint (on interior page) | 1 | pencils: Jack Kirby; inks: George Roussos; colors: Stan Goldberg; letters: Art Simek | The X-Men [Professor X; Cyclops; Marvel Girl [Jean Grey]; Angel; Iceman; Beast]; The Brotherhood of Evil Mutants [Mastermind; Magneto; Toad; Quicksilver; Scarlet Witch] |
| 12 | The Brotherhood of Evil Mutants! | comic story | 23 | script: Stan Lee; pencils: Jack Kirby; inks: Paul Reinman; letters: Artie Simek | The X-Men [Professor X; The Angel; The Beast; Cyclops; Marvel Girl [Jean Grey]; Iceman]; The Brotherhood of Evil Mutants [Mastermind; Magneto; Toad; Quicksilver; Scarlet Witch] |
| 13 | The Angel Is Trapped! | cover reprint (on interior page) | 1 | pencils: Jack Kirby; inks: Paul Reinman, Marie Severin; colors: Stan Goldberg; letters: Art Simek | Cyclops; Marvel Girl [Jean Grey]; Angel; Iceman; Beast; Magneto; Toad; Quicksilver; Scarlet Witch; Mastermind |
| 14 | Trapped: One X-Man! | comic story | 24 | script: Stan Lee; pencils: Jack Kirby; inks: Paul Reinman; letters: Sam Rosen | X-Men [Professor X; Cyclops; Marvel Girl [Jean Grey]; Angel; Iceman; Beast]; John Grey; Elaine Grey; The Brotherhood of Evil Mutants [Magneto; Toad; Quicksilver; Scarlet Witch; Mastermind] |
| 15 | Sub-Mariner Joins the Evil Mutants! | cover reprint (on interior page) | 1 | pencils: Jack Kirby; inks: Chic Stone; colors: Stan Goldberg; letters: Art Simek | The X-Men [Professor X; Cyclops; Marvel Girl [Jean Grey]; Angel; Iceman; Beast]; The Brotherhood of Evil Mutants [Mastermind; Magneto; Toad; Quicksilver; Scarlet Witch]; Namor, the Sub-Mariner |
| 16 | Sub-Mariner! Joins the Evil Mutants | comic story | 22 | script: Stan Lee; pencils: Jack Kirby; inks: Chic Stone; letters: Sam Rosen | The X-Men [Professor X; Cyclops; Marvel Girl [Jean Grey]; Angel; Iceman; Beast]; The Brotherhood of Evil Mutants [Mastermind; Magneto; Toad; Quicksilver; Scarlet Witch]; Namor, the Sub-Mariner |
| 17 | Special Pin-Up Page "Cyclops" | illustration | 1 | pencils: Jack Kirby; inks: Chic Stone; letters: Sam Rosen | Cyclops [Scott Summers] |
| 18 | The Return of the Blob! | cover reprint (on interior page) | 1 | pencils: Jack Kirby; inks: Chic Stone; colors: Stan Goldberg; letters: Art Simek | The X-Men [Cyclops; Marvel Girl [Jean Grey]; Angel; Beast; Iceman]; Brotherhood of Evil Mutants [Magneto; Quicksilver; Scarlet Witch; Mastermind; Toad]; Blob |
| 19 | The Return of the Blob | comic story | 22 | script: Stan Lee; pencils: Jack Kirby; inks: Chic Stone; letters: Artie Simek | The X-Men [Professor X; Cyclops; Marvel Girl [Jean Grey]; Angel; Beast; Iceman); Brotherhood of Evil Mutants [Magneto; Quicksilver; Scarlet Witch; Mastermind; Toad]; Blob; Zelda |
| 20 | The Uncanny Threat of "Unus the Untouchable!" | cover reprint (on interior page) | 1 | pencils: Jack Kirby; inks: Chic Stone; colors: Stan Goldberg; letters: Sam Rosen | The X-Men [The Angel; The Beast; Cyclops; Marvel Girl [Jean Grey]; Iceman]; Unus; |
| 21 | The Uncanny Threat of... "Unus, the Untouchable!" | comic story | 20 | script: Stan Lee; pencils: Jack Kirby; inks: Chic Stone; letters: Sam Rosen | The X-Men [Professor X (cameo); The Angel; The Beast; Cyclops; Marvel Girl [Jean Grey]; Iceman]; Unus (1st); Mastermind |
| 22 | Special Pin-Up Page: The Beast | illustration | 1 | pencils: Jack Kirby; inks: Chic Stone; letters: Sam Rosen | The Beast [Hank McCoy] |
| 23 | Guest-Starring: The Mighty Avengers | cover reprint (on interior page) | 1 | pencils: Jack Kirby; inks: Chic Stone; colors: Stan Goldberg; letters: Sam Rosen | The X-Men [Professor X; The Angel; The Beast; Cyclops; Marvel Girl [Jean Grey]; Iceman]; The Avengers [Giant-Man [Hank Pym]; Thor; Captain America; Iron Man]; Lucifer |
| 24 | Enter, the Avengers! | comic story | 20 | script: Stan Lee; pencils: Jack Kirby; inks: Chic Stone; letters: Sam Rosen | The X-Men [Professor X; The Angel; The Beast; Cyclops; Marvel Girl [Jean Grey]; Iceman]; The Avengers [Giant-Man [Hank Pym]; Thor; Captain America; Iron Man; Wasp]; Lucifer (1st) |
| 25 | No Wonder They Call Her... Marvel Girl | illustration | 1 | pencils: Jack Kirby; inks: Chic Stone; letters: Art Simek, Sam Rosen | Marvel Girl [Jean Grey] |
| 26 | Introducing: Ka-Zar, Lord of the Jungle! | cover reprint (on interior page) | 1 | pencils: Jack Kirby; inks: Chic Stone; colors: Stan Goldberg; letters: Sam Rosen, Art Simek | The X-Men [The Angel; The Beast; Cyclops; Marvel Girl [Jean Grey]; Iceman]; Ka-Zar; Zabu |
| 27 | The Coming of... Ka-Zar! | comic story | 20 | script: Stan Lee; pencils: Jack Kirby; inks: Chic Stone; letters: Sam Rosen | The X-Men [Professor X; The Angel; The Beast; Cyclops; Marvel Girl [Jean Grey]; Iceman]; Ka-Zar (first appearance); Zabu; Maa-Gor; Swamp Men |
| 28 | Introducing "The Stranger" | cover reprint (on interior page) | 1 | pencils: Jack Kirby; inks: Chic Stone; colors: Stan Goldberg; letters: Sam Rosen | The X-Men [Professor X; The Angel; The Beast; Cyclops; Marvel Girl [Jean Grey]; Iceman]; The Stranger |
| 29 | The Triumph of Magneto! | comic story | 20 | script: Stan Lee; pencils: Jack Kirby; inks: Chic Stone; colors: Art Simek; letters: Artie Simek | The X-Men [Professor X; Cyclops; Marvel Girl [Jean Grey]; Iceman; Angel; Beast]; The Stranger (1st); Brotherhood of Evil Mutants [Magneto; Mastermind; Toad; Quicksilver; Scarlet Witch |
| 30 | The Origin of Professor X! | cover reprint (on interior page) | 1 | pencils: Jack Kirby; inks: Frank Giacoia; colors: Stan Goldberg; letters: Sam Rosen | The X-Men [Professor X; Cyclops; Marvel Girl [Jean Grey]; Angel; Beast; Iceman]; Juggernaut |
| 31 | The Origin of Professor X! | comic story | 20 | script: Stan Lee; pencils: Jack Kirby, Alex Toth; inks: Vince Colletta; letters: Sam Rosen | The X-Men [Professor X (Origin); Cyclops; Marvel Girl [Jean Grey]; Angel; Beast; Iceman]; Juggernaut [Cain Marko] (first appearance, origin); Kurt Marko (flashback); Sharon Xavier (Professor X's mother, flashback) |
| 32 | Where Walks the Juggernaut! | cover reprint (on interior page) | 1 | pencils: Jack Kirby; inks: Joe Sinnott; colors: Stan Goldberg; letters: Sam Rosen | The X-Men [Professor X; Cyclops; Marvel Girl [Jean Grey]; Angel; Beast; Iceman]; Human Torch [Johnny Storm]; Juggernaut |
| 33 | Where Walks the Juggernaut! | comic story | 20 | script: Stan Lee; pencils: Jack Kirby, Jay Gavin; inks: Joe Sinnott; letters: Sam Rosen | The X-Men [Professor X; Cyclops; Marvel Girl [Jean Grey]; Angel; Beast; Iceman]; Juggernaut [Cain Marko]; Human Torch [Johnny Storm] |
| 34 | Among Us Stalk... the Sentinels! | cover reprint (on interior page) | 1 | pencils: Jack Kirby; inks: Wally Wood; colors: Stan Goldberg; letters: Sam Rosen | The X-Men [Professor X; Cyclops; Marvel Girl [Jean Grey]; Angel; Beast; Iceman]; Sentinels |
| 35 | Among Us Stalk... the Sentinels! | comic story | 20 | script: Stan Lee; pencils: Jack Kirby, Jay Gavin; inks: Vince Colletta; letters: Artie Simek | The X-Men [Professor X; Cyclops; Marvel Girl [Jean Grey]; Angel; Beast; Iceman]; Sentinels (introduction); Dr. Bolivar Trask (introduction); Zelda; Mr. Worthington; Mrs. Worthington |
| 36 | Extra: In This Epic! The Origin of the Beast! | cover reprint (on interior page) | 1 | pencils: Jack Kirby; inks: Dick Ayers; colors: Stan Goldberg; letters: Sam Rosen | The X-Men [Professor X; Cyclops; Marvel Girl [Jean Grey]; Angel; Beast; Iceman]; Sentinels |
| 37 | Prisoners of the Mysterious Master Mold! | comic story | 20 | script: Stan Lee; pencils: Jack Kirby, Jay Gavin; inks: Dick Ayers; letters: Artie Simek | The X-Men [Professor X; Cyclops; Marvel Girl [Jean Grey]; Angel; Beast (Origin); Iceman]; Sentinels; Master Mold; Dr. Bolivar Trask; Edna McCoy; Norton McCoy |
| 38 | The Supreme Sacrifice! | cover reprint (on interior page) | 1 | pencils: Jack Kirby; inks: Dick Ayers; colors: Stan Goldberg; letters: Sam Rosen | The X-Men [Cyclops; Marvel Girl [Jean Grey]; Angel; Beast; Iceman]; Master Mold |
| 39 | The Supreme Sacrifice! | comic story | 20 | script: Stan Lee; pencils: Jack Kirby, Jay Gavin; inks: Dick Ayers; letters: Artie Simek | The X-Men [Professor X; Cyclops; Marvel Girl [Jean Grey]; Angel; Beast; Iceman]; Sentinels; Master Mold; Dr. Bolivar Trask (death) |
| 40 | ... And None Shall Survive! | cover reprint (on interior page) | 1 | pencils: Jack Kirby; inks: Dick Ayers; colors: Stan Goldberg; letters: Sam Rosen | The X-Men [Professor X; Cyclops; Marvel Girl [Jean Grey]; Angel; Beast; Iceman]; Magneto |
| 41 | ... And None Shall Survive! | comic story | 20 | script: Stan Lee; pencils: Jack Kirby, Jay Gavin; inks: Dick Ayers; letters: Artie Simek | The X-Men [Professor X; Cyclops; Marvel Girl [Jean Grey]; Angel; Beast; Iceman]; Magneto; Mr. Worthington; Mrs. Worthington |
| 42 | If Iceman Should Fail! | cover reprint (on interior page) | 1 | pencils: Werner Roth, Jack Kirby; inks: Sol Brodsky; colors: Stan Goldberg; letters: Sam Rosen | The X-Men [Professor X; Cyclops; Marvel Girl [Jean Grey]; Angel; Beast; Iceman]; Magneto |
| 43 | If Iceman Should Fail--! | comic story | 20 | script: Stan Lee; pencils: Jay Gavin; inks: Dick Ayers; letters: Artie Simek | X-Men [Professor X; Cyclops; Jean Grey; Angel; Beast; Iceman]; Mr. Worthington; Mrs. Worthington; Magneto (villain); Toad (villain); Stranger (cameo) |
| 44 | - | cover reprint (on interior page) | 1 | pencils: Werner Roth, Marie Severin; inks: Dick Ayers, Marie Severin; colors: Stan Goldberg; letters: Sam Rosen | X-Men [Cyclops; Marvel Girl [Jean Grey]; Angel; Beast; Iceman]; Mimic |
| 45 | Lo! Now Shall Appear--the Mimic! | comic story | 20 | script: Stan Lee; pencils: Jay Gavin; inks: Dick Ayers; letters: Artie Simek | The X-Men [Professor X; Cyclops; Marvel Girl [Jean Grey]; Angel; Beast; Iceman]; Zelda; Vera (introduction); Mimic [Calvin Rankin] (introduction, origin) |
| 46 | Our Title is Simply "I, Lucifer!" | cover reprint (on interior page) | 1 | pencils: Werner Roth; inks: Dick Ayers; colors: Stan Goldberg; letters: Sam Rosen | The X-Men [Professor X; Cyclops; Marvel Girl; Angel; Beast; Iceman]; Lucifer; The Blob; Unus |
| 47 | I, Lucifer... | comic story | 20 | script: Roy Thomas; pencils: Jay Gavin; inks: Dick Ayers; letters: Artie Simek | The X-Men [Professor X; Cyclops; Marvel Girl; Angel; Beast; Iceman]; V: Lucifer; the Blob; Unus; The Supreme One |
| 48 | The X-Men #21 Cover | cover reprint (on interior page) | 1 | pencils: Werner Roth; inks: Dick Ayers; colors: Stan Goldberg | The X-Men [Professor X; Cyclops; Marvel Girl; Angel; Beast; Iceman]; Lucifer |
| 49 | From Whence Comes... Dominus? | comic story | 20 | script: Roy Thomas; pencils: Jay Gavin; inks: Dick Ayers; letters: Artie Simek | The X-Men [Professor X; Cyclops; Marvel Girl; Angel; Beast; Iceman]; Lucifer; The Supreme One |
| 50 | Divided We Fall! | cover reprint (on interior page) | 1 | pencils: Werner Roth; inks: Dick Ayers; colors: Stan Goldberg; letters: Sam Rosen | The X-Men [Professor X; Cyclops; Marvel Girl [Jean Grey]; Beast; Angel; Iceman]; Count Nefaria; Unicorn; Eel [Leopold Stryke]; Porcupine; Scarecrow; Plant Man |
| 51 | Divided--We Fall! | comic story | 20 | script: Roy Thomas; pencils: Jay Gavin; inks: Dick Ayers; letters: Artie Simek | X-Men [Professor X; Cyclops; Marvel Girl [Jean Grey]; Beast; Angel; Iceman]; Zelda; Vera; Count Nefaria (villain); Maggia (villain); Eel [Leopold Stryke] (villain); Porcupine (villain); Unicorn (villain); Scarecrow (villain); Plant Man (villain) |
| 52 | To Save a City! | cover reprint (on interior page) | 1 | pencils: Werner Roth; inks: Dick Ayers; colors: Stan Goldberg; letters: Sam Rosen | The X-Men [Cyclops; Marvel Girl; Angel; Beast; Iceman]; Eel; Porcupine; Plant Man; Unicorn; Scarecrow |
| 53 | To Save a City | comic story | 20 | script: Roy Thomas; pencils: Werner Roth; inks: Dick Ayers; letters: Artie Simek | The X-Men [Professor X; Cyclops; Marvel Girl; Angel; Beast; Iceman]; Count Nefaria; Plant Man; Eel; Porcupine; Unicorn; Scarecrow; General Fredericks; Colonel Hendershoot |
| 54 | X-Men #1, Page 6 Original Art | illustration | 1 | script: Stan Lee; pencils: Jack Kirby; inks: Paul Reinman; letters: Sam Rosen | The X-Men |
| 55 | X-Men #1, Page 7 Original Art | illustration | 1 | script: Stan Lee; pencils: Jack Kirby; inks: Paul Reinman; letters: Sam Rosen | The X-Men |
| 56 | X-Men #1, Page 8 Original Art | illustration | 1 | script: Stan Lee; pencils: Jack Kirby; inks: Paul Reinman; letters: Sam Rosen | The X-Men |
| 57 | X-Men #1, Page 11 Original Art | illustration | 1 | script: Stan Lee; pencils: Jack Kirby; inks: Paul Reinman; letters: Sam Rosen | The X-Men; Magneto |
| 58 | X-Men #1, Page 12 Original Art | illustration | 1 | script: Stan Lee; pencils: Jack Kirby; inks: Paul Reinman; letters: Sam Rosen | Magneto |
| 59 | X-Men #16, Page 16 Original Art | illustration | 1 | script: Stan Lee; pencils: Jack Kirby, Jay Gavin; inks: Dick Ayers; letters: Artie Simek | Dr. Bolivar Trask; Sentinels |
| 60 | X-Men #1 House Ad from September 1963 Titles | promo (ad from the publisher) | 1 | pencils: Jack Kirby; inks: Dick Ayers, Sol Brodsky | Fantastic Four; Namor; Spider-Man [Peter Parker] |
| 61 | X-Men #10 House Ad from April 1965 Titles | promo (ad from the publisher) | 1 | pencils: Jack Kirby; inks: Chic Stone | The X-Men |
| 62 | Who Says This Isn't the Marvel Age of Comics?! | promo (ad from the publisher) | 1 | | |
| 63 | Now Hear This! | promo (ad from the publisher) | 1 | pencils: Jack Kirby, Steve Ditko; inks: Chic Stone, Steve Ditko | |
| 64 | X-Men #10 Unused Cover Art | illustration | 1 | pencils: Jack Kirby; inks: Chic Stone | The X-Men |
| 65 | Next in the Epic Collection Library, Iron Man: Stark Wars Volume 13 | promo (ad from the publisher) | 1 | pencils: M. D. Bright; inks: Bob Layton | Iron Man [Tony Stark]; Iron Man [James Rhodes] |
| 66 | The Epic Evolution of the X-Men from Day One! | promo (ad from the publisher) | 1 | pencils: Jack Kirby; inks: George Roussos; colors: Paul Mounts | The X-Men |