Justice League of America 1960 #55 - back issue - $10.00

The JSA, with new member an adult Robin, confront and are defeated by four normal persons on Earth-2, powered by black matter from another universe. When they ask for help from the JLA using Johnny's T-Bolt, he brings them a battered JLA team, suffering the same problem as their counterparts. Both groups them learn the black matter's origins, and resolve to end the problem on Earth-2 first, lest both worlds be destroyed.

On-sale date from copyright registration.

• - Credits for pencils and inks confirmed from Julius Schwartz's editorial records, provided by DC Comics.
• The Super-Crisis That Struck Earth-Two! - Credits for script, pencils and inks confirmed from Julius Schwartz's editorial records, provided by DC Comics. Story across 23 pages in three parts of 11.5 and 10.5 pages. Story continues in #56.
• Down Down Down - house ad for The Brave and the Bold (DC, 1955 series) #73, on sale June 22
• - letters submitted by Bob Rozakis; Larry Good; Leonard Rosenberg
• Crashing out of Legend! - house ad for Bomba the Jungle Boy (DC, 1967 series) #1, on sale July 13
• This Wolf Boy Is Jimmy Olsen! - house ad for Superman's Pal, Jimmy Olsen (DC, 1955 series) #104 [80 Page Giant #G-38], on sale June 13
• - listing of DC comics on sale in late June 1967