For Charles Fernyhough, the birth of his daughter Athena was an opportunity to re-evaluate much of what he had learned as a researcher in developmental psychology.Drawing on the detailed notes he made during her infancy, Fernyhough uses Athena's story to explain how a child's mind develops before the age of three, tapping into a parent's wonder at the processes of psychological development in an engaging, child-centred way.It is written with a father's tenderness and a novelist's empathy and style.