Superboy and the Legion of Super-Heroes, was published by DC Comics and published in 1976. This is the large sized comic book and a limited edition collector's edition. It is Volume 5, No. C-49. It is in used condition but in good shape with no writing, bent pages, or damage inside.

Contents are

• "MORDRU the MERCILESS!"
  Who is the Legion's most feared foe? You'll find out when four Super-Heroes flee to the past to escape the vengence of a mighty sorcerer from the stars!
• "The DEVIL'S JURY"
  In the exciting conclusion of this super-length thriller, the Legion-naires team up with the Pete Ross and Lana (Insect Queen) Lang in a desperate effort to end the reign of the magical MORDRU!
• Super-Heroic Extras
  Complete plans of the legion headquarters
  Legion Wedding Pin-Up (The Marriage of Bouncing Boy and Duo Damsel)
  Key to legion wedding picture - Inside back cover