The Red Queen: Sex and the Evolution of Human Nature
A fantastic book on human sexuality that will forever change how you look at the human condition, relationships, and sex. The thrust of this book is that our biology really drives much of our desires, including non-monogamy.
The Lifestyle: A Look at the Erotic Rites of Swingers
Take a deep dive into the swinging lifestyle. Move beyond the key parties of the 1970’s to the swinging lifestyle subculture of today. If you are interested in the lifestyle the book is worth reading.