Siege Perilous
Fred Hunter was the permanent resident of the space station... the doughnut... because a hideous accident had rendered him physically incapable of returning to Earth. For ten years he sweat it out, while others came and went on tours of duty only a few months long. For ten years he stayed sane, while space gnawed at the minds of others.
Then came the invaders, the strange beings who seemed to be not men, not beasts, not machines. Fred Hunter knew he must face them alone... and what could one crippled man do against their might?
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Lester del Rey
Lester del Rey (1915–1993) was an American science fiction author and editor. Del Rey is especially famous for his juvenile novels such as those which are part of the Winston Science Fiction series, and for Del Rey Books, the fantasy and science fiction branch of Ballantine Books edited by Lester del Rey and his fourth wife Judy-Lynn del Rey.
Lester del Rey used these pseudonyms: Philip St. John, Kenneth Wright, Erik van Lhin, Charles Satterfield, Edson McCann, John Alvarez, Marion Henry, Philip James, Wade Kaempfert, Ramon F. Alvarez-del Rey and Cameron Hall.

