Winter 1963-64 80-page giant featuring "A Super-Collection of Untold Stories and Secret Origins!" Stories include "When Lois First Suspected Clark Was Superman," "Superboy's First Day at School," "The Amazing Superman Junior," "Mr. Mxyzptlk's First Prank," "The Untold Story of Red Kryptonite" (pencils by Curt Swan), "Prisoner of the Super-Heroes" (featuring the Legion of Super-Heroes), "The Rainbow Clark Kent," "The Origin of Superman's Super-Costume," and "Krypton's First Superman." Swan cover pencils. Cover price $0.25.