Blood Lust - J L Lemon

7th in the series. It's the biggest case of their careers and Savannah and Ennis find themselves in a strange competition with their new colleague Cole Jordan. He's a condescending chauvinist bent on driving her crazier than the rash from her radiation treatments. Women are being abducted, tortured, and killed. The killer leaves no evidence. Cole has seen this before and is convinced of one man's guilt. Duke Shelton dominates women for a living. He's handsome, charming and rich and uses all three..