Winner of the Royal Society Insight Investment Science Book Prize 2017. What the judges said: "Every man and woman should read this book about gender biases... an important yet wickedly funny book." "Fine's entertaining and thought-provoking book is a valuable addition to the discussion on gender issues." Ian Critchley, Sunday Times. "Alongside hope, Fine is also angry. We should all be angry. Testosterone Rex is an eye-opening outcry that should inspire an outcry." Guardian. "A densely packed, lively book with an unusual combination of academic rigor and readability... The phrase 'a must-read for everyone' is usually untrue and a cliché, but if there is a book that deserves this description, it could very well be this one." Antonia Macaro, Financial Times. Testosterone Rex is the powerful myth that stifles hopes for gender equality by telling us that men and women have evolved differently.