Published Jan 1964 by DC.
Cover pencils by Curt Swan, inks by George Klein. Imaginary story: Jor-El II and Kal-El II! [The Fantastic Story of Superman's Sons! part 1] starring Superman, Kal-El II [Superman's son], Jor-El II [Superman's son], and Superman's wife, script by Edmond Hamilton, pencils by Curt Swan, inks by George Klein. The New Nightwing and Flamebird! [The Fantastic Story of Superman's Sons! part 2]; Superman's sons become Nightwing II and Flamebird II. Kal-El II's Mission to Krypton! [The Fantastic Story of Superman's Sons! part 3] . 36 pgs. $0.12. Cover price $0.12.