Book excerpt: David Rabe is one of America's finest dramatists. In A Question of Mercy, he explores the controversial and emotional issue of euthanasia, delving deep into the ties that bind friends and lovers. Thomas and Anthony are lovers struggling with Anthony's final, exhausting battle with AIDS. Joined by their friend Susanah and a retired doctor, whose help Thomas has requested , they fashion a heartbreaking friendship as they work through the stages of a plan to relieve Anthony of his illness and his life. Rabe creates a passionate depiction of four people confronted with the reality of a loved one's fight with death, and a compelling dramatic event that poses the question: "What would you do?"