'Sex, Genes and Chromosomes by Jenny Graves is the culmination of a lifelong interest and curiosity in a very special area of developmental biology, the programming of sexual fate. How do organisms become male or female—and how surprising is the diversity of mechanisms by which this decision is made and enacted in different organisms? Jenny is a pioneer in this field and a gifted communicator. She unpacks the dynamic interplay of sex chromosomes, genes, regulatory networks, epigenetic influences, and a role for environment. The book is intellectually rigorous but enlivened by a strong personal element. It spans theory, landmark discoveries, and the passage to the modern genomic era. A must-have for readers interested in sex determination and its environmental reprogramming—and an outstanding resource for anyone with an interest in developmental biology more generally.' Arthur Georges, University of Canberra