This is a rare and highly sought-after Superboy/Legion of Super Heroes comic book, issue #342 from Adventure Comics, published by DC Comics in March 1966. It features Superboy (Clark Kent) and the Legion of Superheroes, in a thrilling adventure set in the DC Universe. The comic book is a 1st edition, in the Silver Age (1956-69) era, with a grade of 4.0 Very Good. It is a single unit, in the format of a single issue, and has several features, including being part of a popular series title, Adventure Comics, and belonging to the genre of superheroes and adventure. This is a valuable addition to any collection of US comics and superhero memorabilia.