Into the Alternate Universe

From Author Wars - https://authorwars.com/books/into-the-alternate-universe-994443.html

Overview:

Title: Into the Alternate Universe
Author: Ed Valigursky
Year: 1964
Type: Cover Art

Variant Titles:

1966. Im Spalt zwischen den Universen

Editions/Publications:

Unknown. The Coils of Time / Into the Alternate Universe (Unknown, Ed Valigursky, Ace Books, $0.45, 128+128 pages, dos, Omnibus)