The new edition retains the author's pungent analysis of what makes math "hard" for otherwise successful people and how women, more than men, become victims of a gendered view of math. It has been substantially updated to incorporate new research on what we know and don't know about "sex differences" in brain organization and function, and it has been enlarged to include problems, puzzles, and strategies tried out in hundreds of math anxiety workshops Tobias and her colleagues have sponsored. What remains unchanged is the author's politics. She sees "math anxiety" as a political issue. So long as people themselves to be disabled in mathematics and do not rise up and confront the social and pedagogical origins of their disabilities, they will be denied "math mental health." Tobias defines this as "the willingness to learn the math you need when you need it." In an ever more technical society, having that willingness can make the difference between high and low self-esteem, failure and success.