'Praise for x + y: 'A way of seeing this exhausting debate from a completely new angle . bold and optimistic' - Guardian 'This book changed my life in the most beautiful way. Eugenia Cheng doesn't just explain why the way our society conceptualizes gender is all wrong - she proposes a new way of thinking about - and beyond - gender. Through accessible graphs and brilliant metaphor, Cheng pushes her readers instead to think about a person's behavior . Stunning' - Rebecca Ramirez 'A fascinating, disarmingly accessible read and a wonderful example of what academics should in general do much more of' - Irish Times 'Compelling . x+y provides useful new tools for change, for those - like me - involved in diversity, equity and inclusion initiatives. For those who are not yet involved, she sets out reasons to become so. And I'm a new fan of pure mathematics.

Dr Cheng, can we be friends?' - Nature.