Dungeons & Dragons is a 32-book series with 32 released primary works first released in 1950 with contributions by Jim Zub, Jim Zubkavich, Don Bassingthwaite, James Wyatt, Matthew Beard, Richard Henry Dana, E. Gary Gygax, Dave Arneson, Tom Moldvay, David Zeb Cook, Frank Mentzer, Gary Gygax, Aaron Allston, Jonathan Tweet, Monte Cook, Skip Williams, Wizards of the Coast, Philip Athans, Rob Heinsoo, Andy Collins, Mike Mearls, Robin D. Laws, Greg Gorden, Greg Bilsland, Robert J. Schwalb, Jeremy Crawford, Matt Sernett, Steve Townshend, Rodney Thompson, Peter Lee, and Bruce R. Cordell.