Title: Showcase Presents Challengers of the Unknown Vol. 1 TPB
Publication Date: 2006 (On Sale: October 18, 2006)
Format: 544-Page Trade Paperback
Cover Price: $16.99
Collection Group: Showcase Presents
Contents: Showcase #6,7,11,12, and Challengers of the Unknown #1-17

Stories:

• Challengers of the Unknown: "The Secrets of the Sorcerer's Box" (24 pages)
  Dave Wood (Writer) Jack Kirby (Artist)
  Reprinted From: Showcase #6 (1957)

• Challengers of the Unknown: "Ultivac Is Loose" (24 pages)
  Jack Kirby (Writer/Artist)
  Reprinted From: Showcase #7 (1957)

• Challengers of the Unknown: "The Day the Earth Blew Up" (24 pages)
  Jack Kirby (Writer/Artist)
  Reprinted From: Showcase #11 (1957)

• Challengers of the Unknown: "The Menace of the Ancient Vials" (24 pages)
  Jack Kirby (Writer/Artist) Wallace Wood (Inker)
  Reprinted From: Showcase #12 (1958)

• Challengers of the Unknown: "The Man Who Tampered with Infinity" (14 pages)
  Jack Kirby (Writer/Penciller) Marvin Stein (Inker)
  Reprinted From: Challengers of the Unknown #1 (1958)

• Challengers of the Unknown: "The Human Pets" (10 pages)
  Jack Kirby (Writer/Penciller) Marvin Stein (Inker)
  Reprinted From: Challengers of the Unknown #1 (1958)

• Challengers of the Unknown: "The Monster Maker" (14 pages)
  Jack Kirby (Writer/Artist)
  Reprinted From: Challengers of the Unknown #2 (1958)

• Challengers of the Unknown: "The Traitorous Challenger" (10 pages)
  Jack Kirby (Writer/Penciller) Wallace Wood (Inker)
  Reprinted From: Challengers of the Unknown #2 (1958)

• Challengers of the Unknown: "The Secret of the Sorcerer's Mirror" (12 pages)
  Jack Kirby (Writer/Penciller) Wallace Wood (Inker)
  Reprinted From: Challengers of the Unknown #3 (1958)

• Challengers of the Unknown: "The Menace of the Invincible Challenger" (12 pages)
  Jack Kirby (Writer/Artist)
  Reprinted From: Challengers of the Unknown #3 (1958)

• Challengers of the Unknown: "The Wizard of Time" (25 pages)
  Jack Kirby (Writer/Penciller) Wallace Wood (Inker)
  Reprinted From: Challengers of the Unknown #4 (1958)

• Challengers of the Unknown: "The Riddle of the Star-Stone" (25 pages)
  Jack Kirby (Writer/Penciller) Wallace Wood (Inker)
  Reprinted From: Challengers of the Unknown #5 (1958)

• Challengers of the Unknown: "Captives of the Space Circus" (15 pages)
  Jack Kirby (Writer/Penciller) Wallace Wood (Inker)
  Reprinted From: Challengers of the Unknown #6 (1959)

• Challengers of the Unknown: "The Sorceress of Forbidden Valley" (10 pages)
  Jack Kirby (Writer/Penciller) Wallace Wood (Inker)
  Reprinted From: Challengers of the Unknown #6 (1959)

• Challengers of the Unknown: "The Beasts from Planet 9" (13 pages)
  Jack Kirby (Writer/Penciller) Wallace Wood (Inker)
  Reprinted From: Challengers of the Unknown #7 (1959)

• Challengers of the Unknown: "The Isle of No Return" (12 pages)
  Jack Kirby (Writer/Penciller) Wallace Wood (Inker)
  Reprinted From: Challengers of the Unknown #7 (1959)

• Challengers of the Unknown: "The Man Who Stole the Future" (12 pages)
  Jack Kirby (Writer/Penciller) Wallace Wood (Inker)
  Reprinted From: Challengers of the Unknown #8 (1959)

• Challengers of the Unknown: "The Prisoners of Robot Planet" (13 pages)
  Jack Kirby (Writer/Penciller) Wallace Wood (Inker)
  Reprinted From: Challengers of the Unknown #8 (1959)

• Challengers of the Unknown: "The Men Who Lost Their Memories" (10 pages)
  Bob Brown (Artist)
  Reprinted From: Challengers of the Unknown #9 (1959)

• Challengers of the Unknown: "The Plot to Destroy Earth" (14 pages)
  Bob Brown (Artist)
  Reprinted From: Challengers of the Unknown #9 (1959)

• Challengers of the Unknown: "The Cave-Man Beast" (12 pages)
  Bob Brown (Artist)
  Reprinted From: Challengers of the Unknown #10 (1959)

• Challengers of the Unknown: "The Four Faces of Doom" (13 pages)
  Bob Brown (Artist)
  Reprinted From: Challengers of the Unknown #10 (1959)

• Challengers of the Unknown: "The Creatures from the Forbidden World" (26 pages)
  France E. Herron (Writer) Bob Brown (Artist)
  Reprinted From: Challengers of the Unknown #11 (1959)

• Challengers of the Unknown: "The Challenger from Outer Space" (12 pages)
  Bob Brown (Artist)
  Reprinted From: Challengers of the Unknown #12 (1960)

• Challengers of the Unknown: "The Three Clues to Sorcery" (13 pages)
  Bob Brown (Artist)
  Reprinted From: Challengers of the Unknown #12 (1960)

• Challengers of the Unknown: "The Prisoner of the Tiny Space Ball" (12 pages)
  Bob Brown (Artist)
  Reprinted From: Challengers of the Unknown #13 (1960)

• Challengers of the Unknown: "The Creatures from the Past" (13 pages)
  Bob Brown (Artist)
  Reprinted From: Challengers of the Unknown #13 (1960)

• Challengers of the Unknown: "The Man Who Conquered the Challengers" (12 pages)
  France E. Herron (Writer) Bob Brown (Artist)
  Reprinted From: Challengers of the Unknown #14 (1960)

• Challengers of the Unknown: "Captives of the Alien Beasts" (13 pages)
  Bob Brown (Artist)
  Reprinted From: Challengers of the Unknown #14 (1960)

• Challengers of the Unknown: "The Return of Multi-Man" (12 pages)
  Bob Brown (Artist)
  Reprinted From: Challengers of the Unknown #15 (1960)

• Challengers of the Unknown: "The Lady Giant and the Beast" (13 pages)
  Bob Brown (Artist)
  Reprinted From: Challengers of the Unknown #15 (1960)

• Challengers of the Unknown: "The Incredible Metal Creature" (12 pages)
  Bob Brown (Artist)
  Reprinted From: Challengers of the Unknown #16 (1960)

• Challengers of the Unknown: "Prisoners of the Mirage World" (13 pages)
  Bob Brown (Artist)
  Reprinted From: Challengers of the Unknown #16 (1960)

• Challengers of the Unknown: "The Genie Who Feared June" (12 pages)
  Bob Brown (Artist)
  Reprinted From: Challengers of the Unknown #17 (1960)

• Challengers of the Unknown: "The Secret of the Space Capsules" (13 pages)
  Bob Brown (Artist)
  Reprinted From: Challengers of the Unknown #17 (1960)