Edna Buchanan: Miami, It's Murder (1994)

From the Publisher:
A brutal rapist is preying on the women of Miami. He doesn't look like a rapist -- and that's the trouble. A serial killer is also loose. He's murdering men in the restrooms of some of the city's classiest office buildings. Miami police reporter Britt Montero is hot on the trail of both of them. But Britt's investigation is leading her into a dangerous, dark world where she may not find her way out again.

Edna Buchanan: Miami, It's Murder. Avon Books, ISBN: 0380722615 (January, 1995), 320 p., $5.99.