In conjunction with The Matrix, the Wachowskis fleshed out the world of their science fiction saga with a series of short comics that originally appeared online and were later collected into two volumes. The stories serve to fill in some of the backstory of the movies, as well as explore tangential characters and concepts, such as people who take advantage of the matrix for personal gain. Collaborators include Neil Gaiman, Bill Sienkiewicz, Geof Darrow, Peter Bagge, David Latham, Paul Chadwick, and Dave Gibbons.