Sinister Barrier

novel of

Umtanum Ridge Crest (wta.org) Get a workout on this steep hike along the Vista Trail from Umtanum Creek to the ridge above the canyon. In spring, it is filled with wildflowers and birds, with chances of seeing rattlesnakes and bighorn sheep. In the fall, there are amazing views from Ellensburg to the Wenas to Yakima and more with fall foliage.

UNKNOWN - First issue, March 1939 (pulpmagazines.org) The size of this magazine exceeds 100 MB. We have chosen to split it into two parts in order to offer the best quality (better vision and direct view) without the user having to download it.
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Sinister Barrier (Wikipedia) Sinister Barrier is an English-language science fiction novel by British writer Eric Frank Russell. The novel originally appeared in the magazine Unknown in 1939, the first novel to appear in its pages. It was first published in book form in 1943 by The World’s Work, Ltd. Russell revised and expanded the book for its first US publication by Fantasy Press in 1948. Most subsequent editions were based on the Fantasy Press version.