In the second part of the book, "Neurosexism", Fine criticizes the current available arguments and studies supporting sex differences in the mind, focusing on methodological weaknesses and implicit assumptions.

In the UK, the book received positive reviews in Nature,[2] The Independent, The Times Literary Supplement, New Scientist, Metro and The Belfast Telegraph.

...(she) ignores that you can be a scientist interested in the nature of sex differences while being a clear supporter of equal opportunities and a firm opponent of all forms of discrimination in society.

[17] Stanford neurobiologist Ben Barres stated in a review for PLOS Biology that Delusions of Gender "should be required reading for every neurobiology student, if not every human being".

They expressed disappointment that Fine's book "...can be vexing in the ways the scientific study of sex differences in brain and behavior is portrayed and (how) the current state-of-the-art is presented".

The books are good ammunition for arguments with people who think science has incontrovertibly shown biological bases for gender differences such as mathematical ability.