X + Y

Reasons I want you to buy this book:
Ingressive: if you buy my staff pick, I gain power and prestige as a bookseller.
Congressive: Separating gender out allows us to approach behavior without getting into the technicalities of "not all men". I want everyone to read this book so we can start using the vocabulary Cheng introduces (ingressive and congressive). Her mathematical approach to gender has the potential to be truly groundbreaking, and I want to see where it leads!
Shana