"What can be said without dispute is that the present editors have done an excellent job in presenting the available material. Their book can be highly recommended to physicists in each of the two parallel branches of the mental universe!"--Peter J. Bussey, Contemporary Physics "This book will be very useful for historians as well any philosophers working on the development of interpretations of quantum theory."--K.-E. Hellwig, Zentralblatt MATH "[T]he book is a mandatory read for anyone interested in the history of the philosophy of quantum mechanics. The editors have skillfully grouped the material according to both chronological order and topical concern, and have added a fair amount of useful annotation, assisting the reader without being overly intrusive. Short but expertly written introductions provide necessary context on the biographical and conceptual dimensions. The book is also a fascinating and rewarding read."--Tilman Sauer, British Journal for the History of Science "In sum: Spinoza's metaphysics has returned in the work of Hugh Everett as physics--as a complete and consistent interpretation of QM that resolves the traditional puzzles of the standard interpretation."--Sheldon Richmond, Philosophy in Review