The Secret of ZI

From Author Wars - https://authorwars.com/books/the-secret-of-zi-1007238.html

Overview:

Title: The Secret of ZI
Author: Ed Emshwiller
Year: 1958
Type: Cover Art

Variant Titles:

1959. Empire
2015. Empire

Editions/Publications:

Unknown. Beyond the Vanishing Point / The Secret of ZI (Unknown, Ed Emshwiller, Ace Books, $0.35, 95+161 pages, dos, Omnibus)