The Defiant Agents

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Overview:

Title: The Defiant Agents
Author: Andre Norton
Year: 1969
Publisher: Ace Books
Price: $0.60
Pages: 192
Binding: Paperback
Type: Novel
Title Reference: The Defiant Agents
Notes:
Date from andre-norton.com website as of 2022-02-05. Second reprint of 1963 edition per andre-norton.com website. No printing or edition stated. Referenced in bibliography by Helen-Jo Jakusz Hewitt published in 1975 publication "The Book of Andre Norton", so no later than 1975.
Price puts this pre-'70, likely '69, not earlier as it's not noted by Tuck
Cover artist is not credited. No visible signature. ACE Image Library credits Emshwiller for Ace F-183, which uses the same illustration. Cover by Ed Emshwiller per andre-norton.com website.