Clancy has penned a masterpiece, examining menstruation from biological, anthropological, and historical perspectives to provide a holistic understanding of this core human function. This is combined with an extremely engaging writing style - I literally laughed out loud a number of times. This doesn't detract from the gravity of issues this book tackles, with Clancy taking care to point out the connection between different methods/practices and their frequently problematic roots. What emerges is a book that both illuminates menstruation and demonstrates how science should be done. Highly recommend