Title: Showcase Presents:Challengers of the Unknown Vol. 2 TPB
Publication Date: 2008 (On Sale: April 30, 2008)
Format: 528-Page Trade Paperback
Cover Price: $16.99
Collection Group: Showcase Presents
Contents: Challengers of the Unknown #18-37

Stories:

• Challengers of the Unknown: "The Menace of Mystery Island" (13 pages)
  Bob Brown (Artist)
  Reprinted From: Challengers of the Unknown #18 (1961)

• Challengers of the Unknown: "The Doomed World of Tomorrow" (12 pages)
  Bob Brown (Artist)
  Reprinted From: Challengers of the Unknown #18 (1961)

• Challengers of the Unknown: "The Alien Who Stole a Planet" (13 pages)
  Bob Brown (Artist)
  Reprinted From: Challengers of the Unknown #19 (1961)

• Challengers of the Unknown: "The Beasts from the Fabulous Gem" (12 pages)
  Bob Brown (Artist)
  Reprinted From: Challengers of the Unknown #19 (1961)

• Challengers of the Unknown: "Multi-Man Strikes Again" (13 pages)
  Bob Brown (Artist)
  Reprinted From: Challengers of the Unknown #20 (1961)

• Challengers of the Unknown: "The Cosmic-Powered Creature" (12 pages)
  Bob Brown (Artist)
  Reprinted From: Challengers of the Unknown #20 (1961)

• Challengers of the Unknown: "The Weird World That Didn't Exist" (12 pages)
  Bob Brown (Artist)
  Reprinted From: Challengers of the Unknown #21 (1961)

• Challengers of the Unknown: "The Challengers' Space-Pet Ally" (13 pages)
  Bob Brown (Artist)
  Reprinted From: Challengers of the Unknown #21 (1961)

• Challengers of the Unknown: "The Curse of the Golden God" (12 pages)
  Bob Brown (Artist)
  Reprinted From: Challengers of the Unknown #22 (1961)

• Challengers of the Unknown: "The Thing in Challenger Mountain" (13 pages)
  Bob Brown (Artist)
  Reprinted From: Challengers of the Unknown #22 (1961)

• Challengers of the Unknown: "Death Guarded the Doom Box" (12 pages)
  Bob Brown (Artist)
  Reprinted From: Challengers of the Unknown #23 (1961)

• Challengers of the Unknown: "The Island in the Sky" (13 pages)
  Bob Brown (Artist)
  Reprinted From: Challengers of the Unknown #23 (1961)

• Challengers of the Unknown: "The Challengers Die at Dawn" (13 pages)
  Bob Brown (Artist)
  Reprinted From: Challengers of the Unknown #24 (1962)

• Challengers of the Unknown: "Multi-Man, Master of Earth" (12 pages)
  Bob Brown (Artist)
  Reprinted From: Challengers of the Unknown #24 (1962)

• Challengers of the Unknown: "Return of the Invincible Pharaoh" (12 pages)
  Bob Brown (Artist)
  Reprinted From: Challengers of the Unknown #25 (1962)

• Challengers of the Unknown: "Captives of the Alien Hunter" (13 pages)
  Bob Brown (Artist)
  Reprinted From: Challengers of the Unknown #25 (1962)

• Challengers of the Unknown: "Death Crowns the Challenger King" (12 pages)
  Bob Brown (Artist)
  Reprinted From: Challengers of the Unknown #26 (1962)

• Challengers of the Unknown: "The Secret of the Space Spectaculars" (13 pages)
  Bob Brown (Artist)
  Reprinted From: Challengers of the Unknown #26 (1962)

• Challengers of the Unknown: "The 1,001 Impossible Inventions" (12 pages)
  Bob Brown (Artist)
  Reprinted From: Challengers of the Unknown #27 (1962)

• Challengers of the Unknown: "Master of the Volcano Men" (13 pages)
  Arnold Drake (Writer) Bob Brown (Artist)
  Reprinted From: Challengers of the Unknown #27 (1962)

• Challengers of the Unknown: "The Revolt of the Terrible FX-1" (11 pages)
  Bob Brown (Artist)
  Reprinted From: Challengers of the Unknown #28 (1962)

• Challengers of the Unknown: "The Riddle of the Faceless Man" (14 pages)
  Bob Brown (Artist)
  Reprinted From: Challengers of the Unknown #28 (1962)

• Challengers of the Unknown: "Four Roads to Doomsday" (14 pages)
  Arnold Drake (Writer) Bob Brown (Artist)
  Reprinted From: Challengers of the Unknown #29 (1962)

• Challengers of the Unknown: "The War Between the Challenger Teams" (11 pages)
  France E. Herron (Writer) Bob Brown (Artist)
  Reprinted From: Challengers of the Unknown #29 (1962)

• Challengers of the Unknown: "Multi-Man... Villain Turned Hero" (13 pages)
  Bob Brown (Artist)
  Reprinted From: Challengers of the Unknown #30 (1963)

• Challengers of the Unknown: "The Fifth Challenger" (13 pages)
  Bob Brown (Artist)
  Reprinted From: Challengers of the Unknown #30 (1963)

• Challengers of the Unknown: "The Man Who Saved the Challenger's Lives" (25 pages)
  Bob Brown (Artist)
  Reprinted From: Challengers of the Unknown #31 (1963)

• Challengers of the Unknown: "One Challenger Must Die" (10 pages)
  Arnold Drake (Writer) Bob Brown (Artist)
  Reprinted From: Challengers of the Unknown #32 (1963)

• Challengers of the Unknown: "Cosmo Turns Traitor" (15 pages)
  Bob Brown (Artist)
  Reprinted From: Challengers of the Unknown #32 (1963)

• Challengers of the Unknown: "The Challengers Meet Their Master" (13 pages)
  Bob Brown (Artist)
  Reprinted From: Challengers of the Unknown #33 (1963)

• Challengers of the Unknown: "The Threat of the Trojan Robot" (12 pages)
  Bob Brown (Artist)
  Reprinted From: Challengers of the Unknown #33 (1963)

• Challengers of the Unknown: "Beachhead, U.S.A." (10 pages)
  France E. Herron (Writer) Bob Brown (Artist)
  Reprinted From: Challengers of the Unknown #34 (1963)

• Challengers of the Unknown: "Multi-Woman, Queen of Disaster" (15 pages)
  Bob Brown (Artist)
  Reprinted From: Challengers of the Unknown #34 (1963)

• Challengers of the Unknown: "The War Against the Moon Beast" (13 pages)
  Bob Brown (Artist)
  Reprinted From: Challengers of the Unknown #35 (1963)

• Challengers of the Unknown: "Sons of the Challengers" (12 pages)
  Bob Brown (Artist)
  Reprinted From: Challengers of the Unknown #35 (1963)

• Challengers of the Unknown: "The Giant in Challenger Mountain" (12 pages)
  Bob Brown (Artist)
  Reprinted From: Challengers of the Unknown #36 (1964)

• Challengers of the Unknown: "Bodyguards to a Star" (14 pages)
  Bob Brown (Artist)
  Reprinted From: Challengers of the Unknown #36 (1964)

• Challengers of the Unknown: "The Triple Terror of Mr. Dimension" (12 pages)
  Bob Brown (Artist)
  Reprinted From: Challengers of the Unknown #37 (1964)

• Challengers of the Unknown: "The Last Days of the Challengers" (13 pages)
  France E. Herron (Writer) Bob Brown (Artist)
  Reprinted From: Challengers of the Unknown #37 (1964)