Eternal Champion

Eternal Champion is a 9-book series with 9 released primary works first released in 1971 with contributions by Michael Moorcock, Tad Williams, David M. Honigsberg, Roland J. Green, Richard Lee Byers, Brad Strickland, Brad Linaweaver, Frieda A. Murray, William Alan Ritch, Kevin T. Stein, Scott Ciencin, E. Gary Gygax, James S. Door, Stewart von Allman, Paul W. Cashman, Nancy A. Collins, Doug Murray, Karl Edward Wagner, Thomas E. Fuller, Jody Lynn Nye, Colin Greenland, Robert E. Weinberg, Charles Partingon, Peter Crowther, James Lovegrove, Nancy Holder, and Neil Gaiman.