A daughter gets tested to see if she's a match to donate a kidney to her father. The test reveals that she is not the man's biological daughter. Should the doctor tell either of them? A deaf couple prefers a deaf baby. Should they be allowed to use medical technology to ensure they have a child who can't hear? In short, engaging scenarios, Jacob Appel takes on hot-button issues that many of us will confront: genetic screening, sexuality, privacy, doctor-patient confidentiality. He unpacks each hypothetical situation with a reflection drawn from science, philosophy, and history, explaining how others have approached these controversies in real-world cases.