The cartoonist revealed on his blog that the deluxe Richard Stark's Parker: The Martini Edition will not ship in July as planned.
Cooke explained that the delay was "100% my fault", and not that of his "publisher (IDW) and fabulous editor (Scott Dunbier)".
"It's a rare occurrence for me to ship something later than it was supposed to," he wrote. "I want to assure everybody looking forward to this book that it is shipping late because of my commitment to making this a very special product and not just a reprint edition. This simply has taken me more time than I anticipated.
Cooke continued: "After much consideration, Scott and I decided the best time for release would be during the Long Beach convention in October.
"I'd like to apologise to all of the readers who've advanced ordered this book. I want you to know that I am doing everything I can to make sure the Parker: Martini Edition will be worth the wait."
The book collects the first two stories in Cooke's acclaimed series of adaptations from Richard Stark's books starring the titular career criminal.
Cooke was recently shortlisted for a 2011 Harvey Award in recognition of his work on the Eisner Award-winning series.