| 0 | - | cover | 1 | pencils: Gil Kane; inks: Gil Kane; colors: Anthony Tollin; letters: Gaspar Saladino | Challengers of the Unknown [Red Ryan; Rocky Davis; Prof Haley; Ace Morgan]; Superboy; Ultra Boy |
| 1 | Adventure Comics Contents | table of contents | 1 | letters: typeset | |
| 2 | All Together Now! | comic story | 9 | script: Bob Rozakis; pencils: Alex Toth; inks: Dan Adkins; colors: Anthony Tollin; letters: John Costanza; editing: Nicola Cuti | Challengers of the Unknown [Ace Morgan; Rocky Davis; Prof Haley; Red Ryan] |
| 3 | The Boy with Ultra-Powers! | comic story | 13 | script: Jerry Siegel; pencils: Curt Swan; inks: George Klein; colors: Gene D'Angelo; letters: Milt Snapinn; editing: Mort Weisinger | Superboy [also as Clark Kent]; Ultra Boy [Jo Nah, also as "Gary Crane"] (introduction and origin); Marla [also as "Ben Crane"]; Pete Ross; Krypto; Lana Lang; Martha Kent; Jonathan Kent |
| 4 | The Explanation! | comic story | 23 | script: Steve Skeates; pencils: Jim Aparo; inks: Frank Giacoia; colors: Bob LeRose; letters: Jim Aparo; editing: Dick Giordano | Aquaman; Mera; Vulko; Narkran; Aquagirl; Aqualad (cameo flashback); Aquababy (cameo flashback) |
| 5 | The Mighty Marvels Join Forces! | comic story | 15 | script: Otto Binder; pencils: C. C. Beck; inks: C. C. Beck; colors: Nansi Hoolahan | Captain Marvel [also appears as Billy Batson]; Captain Marvel, Jr. [also appears as Freddy Freeman]; Mary Marvel [also appears as Mary Batson]; Uncle Marvel; Black Adam [Teth-Adam]; Shazam |
| 6 | The Face Behind the Lead Mask! | comic story | 12 | script: Jerry Siegel; pencils: John Forte, Al Plastino; inks: John Forte, Al Plastino; colors: Gene D'Angelo; letters: Milt Snapinn; editing: Mort Weisinger | Superboy [also appears as Clark Kent]; Legion of Super-Heroes [Cosmic Boy; Saturn Girl; Lightning Lad; Sun Boy; Chameleon Boy (statue); Bouncing Boy (statue); Shrinking Violet (statue); Invisible Kid [Lyle Norg] (statue)]; Lex Luthor; Urthlo; Mon-El |
| 7 | Stop That Kid... Before He Wrecks the World! | comic story | 24 | script: Neal Adams; pencils: Neal Adams; inks: Neal Adams; colors: Jerry Serpe; letters: Gaspar Saladino; editing: Julius Schwartz | Spectre; Jim Corrigan; Hamilton Benedict |
| 8 | The Story Behind the Stories | text article | 1 | script: Paul Levitz | |
| 9 | - | promo (ad from the publisher) | 1 | script: Nicola Cuti; pencils: Howard Bender; inks: Frank Giacoia; letters: Gaspar Saladino | Legion of Super-Heroes [Lightning Lad; Brainiac 5; Cosmic Boy; Saturn Girl; Sun Boy]; Urthlo; Aquaman; Mera; Captain Marvel; Mary Marvel; Captain Marvel, Jr.; Black Adam; Spectre |