Marvel Super-Heroes #13 emerges as a pivotal issue from 1968, featuring a cadre of iconic characters. Among the standout stories, Captain Marvel's introduction is highlighted, alongside the tale of Professor Enric Zagnar, a metaphysics instructor who champions a mystical tome on death. The narrative also includes the communist spies' storyline, the early appearances of Leif the Lucky and Arnold Lupoff, and the identity-stealing antics of Captain Marvel himself.

The issue boasts a notable creative team, including artists and writers like Roy Thomas, Jack Kirby, and Gene Colan, with cover art by Colan and Frank Giacoia. Graded at a 4.0 Very Good by the Comic Book Certification Service (CBCS), this single-issue comic book is a treasured piece from the Silver Age of comics, presenting a blend of fantasy, historical, and science fiction genres.