Siege of the Unseen / The World Swappers
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Overview:
- Title: Siege of the Unseen / The World Swappers
- Author: A. E. van Vogt John Brunner
- Year: 1959
- Type: Omnibuses
Editions/Publications:
- Unknown. Siege of the Unseen / The World Swappers (Unknown, A. E. van Vogt, Ace Books, $0.35, 103+153 pages, dos, Omnibus)
- Unknown. Siege of the Unseen / The World Swappers (Unknown, John Brunner, Ace Books, $0.35, 103+153 pages, dos, Omnibus)