| 0 | - | cover | 1 | pencils: Jim Steranko; inks: Jim Steranko | X-Men [Cyclops; Angel; Beast; Iceman; Marvel Girl] |
| 1 | - | credits, title page | 1 | letters: typeset | |
| 2 | Contents | table of contents | 2 | pencils: John Buscema; inks: George Tuska | Avengers [Black Panther; Goliath; Hawkeye; Wasp]; X-Men [Cyclops; Marvel Girl; Angel; Beast; Iceman] |
| 3 | Introduction | foreword, introduction, preface, afterword | 2 | script: Roy Thomas | |
| 4 | X-Men #43 | cover reprint (on interior page) | 1 | pencils: John Buscema | X-Men [Cyclops; Marvel Girl; Angel; Iceman; Beast]; Magneto |
| 5 | The Torch Is Passed...! | comic story | 15 | script: Roy Thomas; pencils: George Tuska; inks: John Tartaglione; letters: Sam Rosen | X-Men [Cyclops [Scott Summers]; Marvel Girl [Jean Grey]; Angel [Warren Worthington III]; Iceman [Bobby Drake]; Beast [Hank McCoy]]; Magneto; Toad [Mortimer Toynbee]; Quicksliver [Pietro Maximoff]; Scarlet Witch [Wanda Maximoff] |
| 6 | Call Him...Cyclops | comic story | 5 | script: Roy Thomas; pencils: Werner Roth; inks: John Verpoorten; letters: Artie Simek | Cyclops [Scott Summers] |
| 7 | X-Men #44 | cover reprint (on interior page) | 1 | pencils: Don Heck; inks: John Tartaglione | Angel; Red Raven |
| 8 | Red Raven, Red Raven...! | comic story | 15 | script: Roy Thomas, Gary Friedrich; pencils: Don Heck, Werner Roth; inks: John Tartaglione; letters: Sam Rosen | X-Men [Cyclops [Scott Summers]; Marvel Girl [Jean Grey]; Angel [Warren Worthington III]; Iceman [Bobby Drake]; Beast [Hank McCoy]]; Magneto; Toad [Mortimer Toynbee]; Quicksilver [Pietro Maximoff]; Scarlet Witch [Wanda Maximoff]; Red Raven |
| 9 | The Iceman Cometh! | comic story | 5 | script: Gary Friedrich; pencils: George Tuska; inks: John Verpoorten; letters: Artie Simek | Professor X [Charles Xavier]; Cyclops [Scott Summers]; Iceman [Bobby Drake]; Robert Drake; Beatrice Drake; Judy Harmon; Rocky Beasely |
| 10 | X-Men #45 | cover reprint (on interior page) | 1 | pencils: John Buscema; inks: George Tuska, John Verpoorten | Cyclops; Quicksilver |
| 11 | When Mutants Clash! | comic story | 15 | script: Gary Friedrich; pencils: Don Heck, Werner Roth; inks: John Tartaglione; letters: Sam Rosen | X-Men [Cyclops [Scott Summers]; Marvel Girl [Jean Grey]; Angel [Warren Worthington III]; Iceman [Bobby Drake]; Beast [Hank McCoy]]; Quicksilver [Pietro Maximoff]; Scarlet Witch [Wanda Maximoff]; Toad [Mortimer Toynbee]; Magneto |
| 12 | And the Mob Cried...Vengeance! | comic story | 5 | script: Gary Friedrich; pencils: George Tuska; inks: John Verpoorten; letters: Irving Watanabe | Iceman [Bobby Drake]; Cyclops [Scott Summers] |
| 13 | The Avengers #53 | cover reprint (on interior page) | 1 | pencils: John Buscema; inks: George Tuska | Avengers [Black Panther; Goliath; Hawkeye; Wasp]; X-Men [Cyclops; Marvel Girl; Angel; Beast; Iceman] |
| 14 | In Battle Joined! | comic story | 20 | script: Roy Thomas; pencils: John Buscema; inks: George Tuska; letters: Artie Simek | Avengers [Black Panther [T'Challa]; Hawkeye [Clint Barton]; Goliath [Hank Pym]; Wasp [Janet Van Dyne]]; X-Men [Cyclops [Scott Summers]; Marvel Girl [Jean Grey]; Angel [Warren Worthington III]; Iceman [Bobby Drake]; Beast [Hank McCoy]]; Quicksilver [Pietro Maximoff]; Scarlet Witch [Wanda Maximoff]; T |
| 15 | X-Men #46 | cover reprint (on interior page) | 1 | pencils: Don Heck; inks: John Verpoorten, John Tartaglione | X-Men [Cyclops; Marvel Girl; Angel; Iceman; Beast]; Juggernaut |
| 16 | The End of the X-Men! | comic story | 15 | script: Gary Friedrich; pencils: Don Heck, Werner Roth; inks: John Tartaglione; letters: Artie Simek | X-Men [Cyclops [Scott Summers]; Marvel Girl [Jean Grey]; Angel [Warren Worthington III]; Iceman [Bobby Drake]; Beast [Hank McCoy]]; Foggy Nelson; Juggernaut [Cain Marko] |
| 17 | ...And Then There Were Two | comic story | 5 | script: Gary Friedrich; pencils: George Tuska; inks: John Tartaglione; letters: Artie Simek | Professor X [Charles Xavier]; Iceman [Bobby Drake]; Cyclops [Scott Summers] |
| 18 | X-Men #47 | cover reprint (on interior page) | 1 | pencils: Don Heck; inks: Frank Giacoia | X-Men [Beast; Iceman]; Maha Yogi |
| 19 | The Warlock Wears Three Faces! | comic story | 15 | script: Gary Friedrich, Arnold Drake; pencils: Don Heck, Werner Roth; inks: John Tartaglione; letters: Artie Simek | X-Men [Beast [Hank McCoy]; Iceman [Bobby Drake]]; Zelda Kurtzberg; Vera Cantor; Maha Yogi [Warlock] |
| 20 | I, the Iceman | comic story | 5 | script: Arnold Drake; pencils: Werner Roth; inks: John Verpoorten; letters: Joe Rosen | Iceman [Bobby Drake] |
| 21 | X-Men #48 | cover reprint (on interior page) | 1 | pencils: John Romita; inks: Frank Giacoia, John Romita | X-Men [Cyclops; Marvel Girl] |
| 22 | Beware Computo Commander of the Robot Hive! | comic story | 15 | script: Arnold Drake; pencils: Don Heck, Werner Roth; inks: John Verpoorten; letters: Irving Watanabe | X-Men [Cyclops [Scott Summers]; Marvel Girl [Jean Grey]]; Computo; Quasimodo |
| 23 | Yours Truly the Beast | comic story | 5 | script: Arnold Drake; pencils: Werner Roth; inks: John Verpoorten; letters: Irving Watanabe | Beast [Hank McCoy] |
| 24 | X-Men #49 | cover reprint (on interior page) | 1 | pencils: Jim Steranko; inks: Jim Steranko | X-Men [Cyclops; Marvel Girl; Angel; Iceman; Beast] |
| 25 | Who Dares Defy...the Demi-Men? | comic story | 15 | script: Arnold Drake; pencils: Don Heck, Werner Roth; inks: John Tartaglione; letters: Herb Cooper | X-Men [Cyclops [Scott Summers]; Marvel Girl [Jean Grey]; Angel [Warren Worthington III]; Iceman [Bobby Drake]; Beast [Hank McCoy]]; Mesmero; Lorna Dane |
| 26 | A Beast Is Born | comic story | 5 | script: Arnold Drake; pencils: Werner Roth; inks: John Verpoorten; letters: Irving Watanabe | Beast [Hank McCoy] |
| 27 | X-Men #50 | cover reprint (on interior page) | 1 | pencils: Jim Steranko; inks: Jim Steranko | X-Men [Cyclops; Marvel Girl; Angel; Iceman; Beast]; Polaris |
| 28 | City of Mutants | comic story | 15 | script: Arnold Drake; pencils: Jim Steranko; inks: John Tartaglione; letters: Herb Cooper | X-Men [Cyclops [Scott Summers]; Marvel Girl [Jean Grey]; Angel [Warren Worthington III]; Iceman [Bobby Drake]; Beast [Hank McCoy]]; Polaris [Lorna Dane]; Mesmero; Magneto |
| 29 | This Boy--This Bombshell! | comic story | 5 | script: Arnold Drake; pencils: Werner Roth; inks: John Verpoorten; letters: Herb Cooper | Beast [Hank McCoy] |
| 30 | X-Men #51 | cover reprint (on interior page) | 1 | pencils: Jim Steranko; inks: Jim Steranko | X-Men [Angel; Beast; Cyclops; Iceman; Marvel Girl]; Erik the Red |
| 31 | The Devil Had a Daughter! | comic story | 15 | script: Arnold Drake; pencils: Jim Steranko; inks: Jim Steranko; letters: Sam Rosen | X-Men [Cyclops [Scott Summers]; Marvel Girl [Jean Grey]; Angel [Warren Worthington III]; Iceman [Bobby Drake]; Beast [Hank McCoy]]; Polaris [Lorna Dane]; Mesmero; Magneto |
| 32 | The Lure of the Beast-Nappers! | comic story | 5 | script: Arnold Drake; pencils: Werner Roth; inks: John Tartaglione; letters: Herb Cooper | Professor X [Charles Xavier]; Cyclops [Scott Summers]; Iceman [Bobby Drake]; Beast [Hank McCoy]; Conquistador [Orlando Furio] |
| 33 | X-Men #52 | cover reprint (on interior page) | 1 | pencils: Marie Severin; inks: Joe Sinnott | X-Men [Marvel Girl; Angel; Iceman; Beast]; Magneto; Eric the Red |
| 34 | Twilight of the Mutants! | comic story | 15 | script: Arnold Drake; pencils: Don Heck, Werner Roth; inks: John Tartaglione; letters: Sam Rosen | X-Men [Erik the Red [Scott Summers]; Marvel Girl [Jean Grey]; Angel [Warren Worthington III]; Iceman [Bobby Drake]; Beast [Hank McCoy]]; Polaris [Lorna Dane]; Mesmero; Magneto |
| 35 | The Crimes of the Conquistador! | comic story | 5 | script: Arnold Drake; pencils: Werner Roth; inks: John Verpoorten; letters: Sam Rosen | Professor X [Charles Xavier]; Cyclops [Scott Summers]; Iceman [Bobby Drake]; Angel [Warren Worthington III]; Beast [Hank McCoy]; Conquistador [Orlando Furio] |
| 36 | X-Men #53 | cover reprint (on interior page) | 1 | pencils: Barry Smith; inks: Mike Esposito | X-Men [Cyclops; Marvel Girl; Angel; Iceman; Beast]; Blastaar |
| 37 | The Rage of Blastaar! | comic story | 15 | script: Arnold Drake; pencils: Barry Smith; inks: Michael Dee; letters: Herb Cooper | X-Men [Cyclops [Scott Summers]; Marvel Girl [Jean Grey]; Angel [Warren Worthington III]; Iceman [Bobby Drake]; Beast [Hank McCoy]]; Blastaar |
| 38 | Welcome to the Club, Beast! | comic story | 5 | script: Arnold Drake; pencils: Werner Roth; inks: John Tartaglione; letters: Jean Simek | Professor X [Charles Xavier]; Cyclops [Scott Summers]; Iceman [Bobby Drake]; Angel [Warren Worthington III]; Beast [Hank McCoy]; Conquistador [Orlando Furio] |
| 39 | From the Sky...Winged Wrath! | comic story | 11 | script: Jerry Siegel; pencils: George Tuska; inks: Dick Ayers; letters: Sam Rosen | Angel [Warren Worthington III]; Candy Southern; Dazzler [Burt Worthington] |
| 40 | ...In the Den of the Dazzler! | comic story | 11 | script: Jerry Siegel; pencils: George Tuska; inks: Dick Ayers; letters: Sam Rosen | Angel [Warren Worthington III]; Candy Southern; Dazzler [Burt Worthington] |
| 41 | To Cage an Angel! | comic story | 11 | script: Jerry Siegel; pencils: George Tuska; inks: Dick Ayers; letters: Artie Simek; editing: Roy Thomas | Angel [Warren Worthington III]; Candy Southern; Dazzler [Burt Worthington] |