Action Comics comics historian Les Daniels, artist Curt Swan became the definitive artist of Superman in the early 1960s with a "new look" to the character that replaced Wayne Boring's version. Bizarro World first appeared in the story "The World of Bizarros!" in issue #262 (April 1960). Writer Jim Shooter created the villain the Parasite in "Action Comics" #340 (Aug. 1966). Mort Weisinger retired from DC in 1970 and his final issue of "Action Comics" was issue #392 (September 1970). Murray Boltinoff became the title's editor until issue #418. Metamorpho was the backup feature in issues #413–418 after which the character had
Action Comics 1 copy for US$1.5 million, making it the most expensive and most valuable comic book of all time. The copy sold is the third highest-graded copy from the CGC, which stands at 8.5 VF+ grade. As of 2011, there were six known Comic Guaranty LLC (CGC)-graded copies with a grade above VG (CGC 4.0), with only one issue having the grade of VF/NM (CGC 9.0) at that time. EC and "Mad" publisher William Gaines, whose father was also a comic book publisher and had business dealings with DC Comics at the time "Action Comics" #1 was published, claimed in a "Comics