This book was first published in 1956. According to Amazon, it’s a “racy, realistic look at gangsters who terrorized the entire town.” Did they terrorize why them while on the phone in the tub? I guess if he could “buy cops the way he bought women,” he might as well.
This cover was done by Raymond Johnson, whose work has been featured many times on this site. Obviously, the thing that catches your attention about this cover is the way the giant exclamation mark is also used to give the reader a peek inside the story. No one in either the period or the mark above appear to be feeling any fear.