Reading maps or reading emotions? Barbie or Lego? Do you have a female brain or a male brain? Or is that the wrong question? We live in a gendered world where we are bombarded with messages about sex and gender. On a daily basis we face deeply ingrained beliefs that your sex determines your skills and preferences, from toys and colours to career choice and salaries. But what does this constant gendering mean for our thoughts, decisions and behaviour? And what does it mean for our brains? Drawing on her work as a professor of cognitive neuroimaging, Gina Rippon unpacks the stereotypes that bombard us from our earliest moments and shows how these messages mould our ideas of ourselves and even shape our brains.