I misspelled the author’s pen name. It’s Hank Janson. Several authors wrote under that pen name. This was a British pulp crime series.
I think the most similar American series is Mike Shayne. A redheaded, tough guy PI. Written under the pen name Brett Halliday. Several authors wrote the series. It was a typical pulp crime novel. With a sexy women on the cover. The stories were short. Maybe a 100 pages at the most.
Hank Janson’s stories were about the same length. A 14 year old could easily finish these books in a couple hours.
The writing and plots in pulp fiction were pretty simplistic. They were just one step past the Hardy Boy books.
I loved these books in high school. Anyone remember the Crime magazines? I used to buy Crime Detective at Walgreens. Official Police Detective was another one I bought.
The covers look horrible now. But reading these pulp magazines was very common. The stories were never as bad as the cover. The shocking covers sold the magazine. Kids a few years later were watching Jamie Lee Curtis in Halloween, the Friday 13th movies and Nightmare Elm Street. Teens like horror.