Reviews of the hardback: This is a superbly crafted and exhaustively researched account of the development of Leibniz's thought … It is an extraordinary achievement, for the task of writing an intellectual biography of Leibniz is huge. This is a work of unparalleled scholarship that is certain to remain the standard source on its subject for many years to come.' Journal of the History of Philosophy 'Maria Rosa Antognazza's biography fills, splendidly, one of the major gaps in the literature on Leibniz. It is a magisterial scholarly biography, richly documented with copious citations of the original texts now available.' The Leibniz Review 'A meticulously researched and eloquently written biography that will be both an indispensable reference for scholars of Leibniz's thought and the definitive account of his intellectual development for many years to come.' Canadian Journal of History 'A scholarly tour de force … I regard [Antognazza's] work as a monumental and lasting contribution to Leibniz scholarship, one that will be read by every serious student of Leibniz.' Notre Dame Philosophical Reviews 'Antognazza richly fulfils the reader's hope of having received the definitive intellectual biography of Leibniz for our time.' The Heythrop Journal 'An intellectual biography that is faultless from all points of view and places Leibniz's thought very precisely in the philosophical, scientific, political and theological context of his time.' Dialogue: Canadian Philosophical Review 'A biography of the greatest value which manages to be an indispensable tool for specialists and, at the same time, a wide-ranging introduction to be recommended to those who approach for the first time the thought of such a complex philosopher.' Giornale Critico della Filosofia Italiana 'This is an impressive work, written in a flowing narrative that even someone not versed in calculus, natural history, theology or philosophy will find enthralling.' Reference and Research Book News '[Antognazza] has re-evaluated all the sources and constructed a lively and thoroughly documented story that is unlikely to be seriously challenged, even on matters of detail. She has also done her best to turn the facts of this life-that-was-not-one into a coherent narrative.' London Review of Books '… extensive and detailed … the unique feature of this book is that it provides clear and interesting details about his mathematical research and the later dipute over priority with the Newtonians.' Zentralblatt MATH '… the book is first-rate; the level of detail and its relation to Leibniz's various intellectual projects is appropriate and useful. For early modern scholars, this biography will serve as a vital reference work.' History