Published Jul 1962 by DC.
Cover pencils by Curt Swan, inks by George Klein. The Underwater Pranks of Mr. Mxyzptlk!, script by Edmond Hamilton, pencils by Curt Swan, inks by George Klein; Mr. Mxyzptlk returns to the 3rd dimension to attempt to win a practical joke contest in his home dimension. Krypton's First Superman! starring Lori Lemaris, script by Jerry Siegel, pencils by Curt Swan, inks by George Klein; Supergirl discovers why Superman has begun to act evil at random intervals, and it all goes back to before Krypton exploded. Superman is also featured in a one-page public service announcement, Be a Good Citizen. 36 pgs. $0.12. Cover price $0.12.