The other writers to win more than once are Richard E. Geis, with seven wins out of sixteen nominations; Mike Glyer, with four wins out of twenty-five nominations; Susan Wood Glicksohn, with three of eight; Harry Warner, Jr., with two out of eight; Wilson Tucker, with two out of eight; Bob Shaw, who won both times he was nominated; Forrest J Ackerman, with three out of five Retro Hugos; and Ray Bradbury, who won both Retro Hugos he was nominated for.