Simon LeVay, author of Attraction, Love, Sex: The Inside Story:
The Other Big Bang offers a grand perspective on evolutionary and human history, from the origins of life on Earth to the emergent complexities of human sexuality.

Andrew H. Knoll, author of A Brief History of Earth: Four Billion Years in Eight Chapters:
In The Other Big Bang, Eric Haag explores one of life’s most basic features. In discussions at once accessible and deeply informed by biology, Haag illuminates not only the origins of sex and its role in promoting biological diversity but also the many ways in which it has shaped our own bodies and behavior. His chapters on sexism, sexual aggression, and sexual orientation are both firmly grounded in science and compassionate—required reading for thoughtful citizens.

Lisa M. Diamond, author of Sexual Fluidity: Understanding Women’s Love and Desire:
This beautifully written book provides a tour of the biology of sex, offering both a rigorous overview and deeper evolutionary framing to help the reader fully grasp the key issues. Writing in a friendly, approachable voice, Eric S. Haag does a lovely job in drawing the reader into the relevance of a particular question and then zooming out to see where that issue fits in the broader scope of human evolution.