Baker's dozen -- 13 short science fiction novels

Profession - novella by Isaac Asimov Who Goes There? - novella by John W. Campbell, Jr. [as by Don A. Stuart] For I Am a Jealous People! - novella by Lester del Rey The Mortal and the Monster - novella by Gordon R. Dickson (variant of The Monster and the Maiden) Time Safari - novella by David Drake In the Western Tradition - novella by Phyllis Eisenstein The Alley Man - novella by Philip José Farmer The Sellers of the Dream - novelette by John Jakes [as by John W. Jakes] The Moon Goddess and the Son - novella by Donald Kingsbury Enemy Mine - novella by Barry B. Longyear Flash Crowd - novella by Larry Niven In the Problem Pit - novella by Frederik Pohl The Desert of Stolen Dreams - novella by Robert Silverberg