Brett Halliday (July 31, 1904 - February 4, 1977), primary pen name of Davis Dresser, was an American mystery writer, best known for the long-lived series of Mike Shayne novels he wrote, and later commissioned others to write. Dresser wrote non-series mysteries, westerns and romances under the names
A Redhead for Michael Shayne is one of the many Shayne novels written after Dresser stopped writing them and Brett Halliday went from being his pseudonym to being a house name. It's not clear who wrote this one but in plot, tone, and style it is unlike other books in the series and some of the characters sound off. I actually think that it was originally a pulp spy novel reworked to be a Mike Shayne book. It's a Cold War gun-running spy novel but not necessarily successful as a Mike Shayne novel.
I decided to read a random Mike Shayne novel--rumor has it that this is the 48th in the series--and I was rewarded with a steaming bowl of hard-boiled crap stew. Lesson learned!