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Sleepwalkers World (original 1971; edition 2012)
by Gordon R Dickson (Author)
Sleepwalker's World by Gordon R. Dickson (1971)
References to this work on external resources.
Wikipedia in English
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Rafe Harald, a cosmonaut, attempts to combat the mysterious power that has put most of the human race into an involuntary sleep.
(summary from another edition)
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