Take a Pair of Private Eyes

From Author Wars - https://authorwars.com/publications/take-a-pair-of-private-eyes-1002035.html

Overview:

Title: Take a Pair of Private Eyes
Author: J. T. McIntosh
Year: 1968
Publisher: Doubleday & Company
Price: $3.95
Pages: 191
Binding: Hardcover
Type: Novel
Title Reference: Take a Pair of Private Eyes
Notes: Info from a copy on eBay. Seller's description mentions "excellent dust jacket by Herb Rogoff"; there is no signature on the front cover or photo of the back flap where, presumably, the artist is credited so his name has been entered the same way as his other ISFDB credits.