This essay outlines how the book, "Paths to Discovery: Autobiographies from Chicanas with Careers in Science, Mathematics, and Engineering" (Cantu, 2008) came about. I then use "testimonio" theory to analyze the narratives in this book as the data of a qualitative study, and I describe the general themes that the analysis highlights. I scrutinize the factors that affected the authors' success in school and career, including the roles of parents, teachers, extended family, and community; I also describe the impact of the intersection of gender, race, and class on their academic journeys. This article looks at Chicanas in science, technology, engineering, and mathematics (STEM) fields and concludes with policy recommendations for increasing the number of Chicanas and Latinas in STEM. (Contains 1 table and 9 notes.)