A pioneering female theoretical physicist writes about her professional life from the late 1950s to the present, with the motive of encouraging women who are thinking of entering physics. She is a physicist first, so much of the book describes the problems she was working on which many non-scientists readers will not find so interesting and which almost require some previous exposure to particle physics theory. To me the valuable parts of the book are her experiences with other physicists (she worked with many of the biggest names in theoretical particle physics) and the challenges she faced as a woman in a very heavily male dominated field, beginning before the women's movement opened things up for women generally. She notes in the last chapter that difficulties for women still remain, both in children's and young adults' education and on the professional level, though she has seen dramatic improvements in the attitudes of male professionals towards women. This is a very objective treatment and I think she still finds discrimination against women, such as she experienced, completely mystifying.