This book, the fruit of decades of Leibniz scholarship, is a masterpiece of history of philosophy. Three central aspects of the philosophy of Leibniz are examined, with meticulous attention to the primary texts, and carefully worked out interpretations, some of them novel. The secondary literature on Leibniz up to 1994 is given due attention, and Adams engages with alternative interpretations, and with some of the editorial decisions of editors of Leibniz's works. This book is required reading for the history of early modern philosophy. ( )