SINISTER BARRIER: Galaxy Science Fiction Novel No. 1.
Edition: First thus- a digest sized paperback.
New York: World Editions, Inc, 1950. First edition - The first paperback edition of the author's first novel, originally serialized in 'Unknown' magazine 1939, and published in hardcover in 1943 and 1948. In addition this is the first novel in the Galaxy Science Fiction Novel series. 158 pp.
Condition: Very good in illustrated wrappers (bright cover, usual toning to the pages)