Triad: Three Complete Science Fiction Novels (The World of Null-A, The Voyage of the Space Beagle, Slan)

This omnibus was first published by the SFBC in April 1959, but it had a 1951 copyright date. This misled collectors and bibliographers into believing that there was a Simon and Schuster trade edition in 1951. Omnibus edition of three novels, originally published separately: Slan (1946), The Voyage of the Space Beagle (1950), and The World of Null-A (1945). Parts of The Voyage of the Space Beagle were originally published separately as short stories: Black Destroyer, War of Nerves, Discord in Scarlet, and M33 in Andromeda.