Catalog data from Open Library
4 · 162 pages · First published 1965
When Robert Wolff finds a strange horn he has the key to the door between universes. A door through space-time leading to a space unlike ours, built on tiers, where he has to work his way up to find out who created it.
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- Editions
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- Publishers
- Phantasia Press, ace books, inc., ACE, Lightyear Press, Little, Brown Book Group Limited, Orion Publishing Group, Limited
- Languages
- eng