Who Speaks of Conquest?

From Author Wars - https://authorwars.com/books/who-speaks-of-conquest-1545278.html

Overview:

Title: Who Speaks of Conquest?
Author: Stanley Meltzoff
Year: 1957
Type: Cover Art

Variant Titles:

1960. Sternenfahrer unerwünscht

Editions/Publications:

Unknown. The Earth in Peril / Who Speaks of Conquest? (Unknown, Stanley Meltzoff, Ace Books, $0.35, 158+160 pages, dos, Omnibus)