(From the publisher):
Sylvia seemed like a carefree way for Hank Janson to spend a night, but it cost him more in the end than he could have guessed. For his passionate date turned out to have some rough friends who thought that a hard-boiled reporter should mind his own business and not ask questions about kidnapped wives who wrote home to their husbands and asked for money to save them...
Original title: Enemy of Men
Alternative titles: A Nympho Named Sylvia