Softcover. PS Artbooks, reprint, Book: Very Good, Dust Jacket: None, Softcover, 64 pages. From December, 1941. Art by Mac Raboy, C. C. Beck et al. A key issue, with Captain Nazi jumping over from the pages of Master Comics to fight CM and it all brings about, right here, the origin of Captain Marvel, Jr. Capt. Nazi attacks a young boy and leaves him crippled, which can't be reversed. But CM goes to his mentor Shazam and agrees to give some of his power to the boy, so that when Freddy says "Captain Marvel" he turns into the super-powered Captain Marvel, Jr. CM then sends him back to Master Comics (yes, really) to aid Bulletman in his own battle with Captain Nazi. All of this is part of a 3-part origin story. CM Jr. immediately became the long running cover feature of Master Comics.