Superman must find out the identity of the mysterious gang leader known as the Unknown X who has organized one of the most thorough criminal organizations Metropolis has ever seen.
Comments
More by Bill Finger, Gardner Fox, Jerry Siegel, Henry Boltinoff, Bob Kane, Harry Lampert & Joseph Sulman
Bill Finger, Don Cameron, David Vern Reed, Dennis O'Neil, John Byrne, Tony Daniel, Scott Snyder, Paul Dini, Greg Rucka, Chuck Dixon, Joe Staton, Bob Kane, Jack Burnley, Dick Sprang, Sheldon Moldoff & Greg Capullo
Mike W. Barr, John Broome, Don Cameron, Paul Dini, Chuck Dixon, Steve Englehart, Bill Finger, Neal Adams, Jim Aparo, Rick Burchett, Jack Burnley & Greg Capullo
Bill Finger, Len Wein, Mike W. Barr, Doug Moench, A.J. Lieberman, Bob Kane, Sheldon Moldoff, Keith Giffen, Kelley Jones, Al Barrionuevo, Marshall Rogers & Dick Giordano
Bill Finger, Alan Grant, Doug Moench, John Ostrander, Paul Dini, Jason Aaron, Bob Kane, Norm Breyfogle, Don Newton, Kelley Jones, Joe Staton & Jason Pearson
Geoff Johns, Grant Morrison, Brian Azzarello, Jerry Siegel, Bill Finger, Len Wein, John Byrne, Curt Swan, Frank Quitely, Lee Bermejo, Doug Mahnke, Dick Sprang & Joe Shuster
Michael Uslan, Bill Finger, David Vern Reed, Dave Wood, France Herron, Gardner Fox, John Broome, Bob Kane, Dick Sprang, Sheldon Moldoff & Carmine Infantino
Archie Goodwin, Joe Millard, Bill Finger, Bob Haney, Kurt Schaffenberger, Bob Kane, Jack Cole, Sal Amendola, Howard Chaykin, Alex Toth, Paul Gustavson, Jim Mooney & Walt Simonson
