This issue is a variant of Detective Comics (DC, 1937 series) #540 [Direct]. There exist further variants.
Color credits confirmed by Anthony Tollin.
Continued from Batman (DC, 1940 series) #373.
Letters of comment from Chuck Sholea, Jeffrey Lowndes, Christopher Melchert, David Sheedy, S. Kenneth Kawano, Aisha Cruz and T. M. Maple.