The Nebula Awards are voted on, and presented by, active members of the Science Fiction and Fantasy Writers of America, Inc. The Grand Master Award is given to a living author for a lifetime's achievement in science fiction and/or fantasy. Frederik Pohl, an eminent figure in SF, has been authorized by the SFWA to edit an anthology in three big volumes featuring substantial selections of the work of all the first fifteen Grand Masters. Volume One, presenting the first five writers to receive the award, features the fiction of: Robert A. Heinlein Jack Williamson Clifford D. Simak L. Sprague de Camp Fritz Leiber