Art from Amazing Adventures# 3 (Aug 1961), featuring Dr. Droom vs. Zemu. Art by Kirby/Ayers. I’m not an expert on Marvel reprints, but I don’t recall ever seeing this material reprinted anywhere. I’d guess it might pop up in a monster genre book here and there, but Dr. Droom seems like one of Jack’s lesser known Marvel creations — obviously the character is very similar to Ditko’s Dr. Strange, and the “Dr. Droom” name could have been one rung on the ladder towards Kirby’s Dr. Doom.