"Brown's book is historically and philosophically rich and provocative. Her discussion in chapters 3-5 deftly illustrates the way in which attention to the Passions helps to shed a new light on long-standing questions in the interpretation of Descartes, and she also elaborates a challenging approach to understanding the Passions as a whole. Descartes scholars, philosophers interested in early modern conceptions of the passions, and philosophers interested in the history of theories of the passions will all profit from engaging with Brown's book." - Sean Greenberg, University of California, Irvine