Former library copy. Good condition. Dr. Lori Westlake has been invited to join the Circle of Peace, a clandestine euthanasia society operating at Sentinel Health Systems (SHS), a state-of-the-art HMO in Dallas, Texas. What she doesn't know is that lurking among the members of the society is a serial mercy killer who calls himself the Angel of Mercy. Suspense and mystery unite in this fast-paced novel that mirrors our culture's real-life debate about quality of life and who has the right to end it.