In "Stiff: The Curious Lives of Human Cadavers," Mary Roach explores the often overlooked topic of human corpses and their roles in scientific research. The author delves into various aspects of cadaver studies, highlighting how they contribute to our understanding of human anatomy, forensic science, and beyond. Roach's writing blends humor and factual information, making the subject approachable and engaging for readers.

A key insight from the book is the hesitation surrounding the sharing of certain details about cadaver research. Roach suggests that divulging specific information could lead to individuals reconsidering their consent for body donation. This reflects a broader theme of the book, where the complex emotions tied to death and the use of human remains in science are examined, raising important questions about ethics and public perception.