The Always Anonymous Beast by Lauren Wright Douglas

Meet Caitlin Reece, Smart, cool, tough. A dropout from conventional life. Highly competent in her chosen profession. She has no office, obtains clients by referral only and never leaves home without her .357 Magnum Smith and Wesson. ValFrazier, Victorias star TV anchorwoman, is Caitlins newest client. She is the victim of a viciously homophobic blackmailer who has discovered her relationship with Tonia Konig. Tonia is a lesbian feminist professor, an outspoken, passionately committed proponent of nonviolence. She is enraged by her own helplessness, she is outraged by Caitlins challenge to her most fundamental beliefs, and by Caitlin herself, whom she considers a thug.