Andrew Leman is one of the founding members of the H. P. Lovecraft Historical Society, and has produced a number of literary, film, theatrical, music, prop and gaming projects there over the decades with his longtime friend and collaborator Sean Branney. He has written and produced more than 20 live-action Lovecraftian role-playing games. He wrote and directed the first HPLHS film, "The Testimony of Randolph Carter", directed "The Call of Cthulhu", and co-wrote and co-produced The Whisperer in Darkness.