In 1973 Sword of Sorcery appeared, a comic book based on Leiber's characters. It was a very well-written, intricately-drawn magazine, but only five issues were ever produced. Today they are considered collectors' items. Several game versions of the Fafhrd and Grey Mouser stories have also been marketed, for example an Advanced Dungeons and Dragons module entitled Lankhmar, City of Adventure (1985). In 1991 Howard Chaykin published a two volume Fafhrd and the Grey Mouser graphic novel.