Red Cat (John March Series)

This riveting mystery finds Private Investigator John March descending into Manhattan’s dark and scandalous underworld to help a member of his own family. David March, John’s brother, has been having affairs with anonymous women he meets on the internet. Now one of these women is stalking him. David knows her only as Wren. She, however, knows everything about David—and she's threatening to tell his wife and colleagues, ruining his life. With his marriage, career, and reputation at stake, David asks John to find her. What John discovers is there is more to Wren than David knows. She’s an intriguing mystery, an internet pornographer and video artist with a penchant for turning the tables on her subjects. But when she turns up dead, John finds he's no longer searching for a stalker—now he's looking for a murderer, and the clues keep leading him back to his older brother’s doorstep.