Review of the first edition: 'Taken as a whole, this book is something of a theoretical masterpiece. With its tight organization, the book leads the determined (and theoretically inclined) reader on a tour encompassing some of the most challenging yet beautiful topics in contemporary theoretical physics … Virtually every chapter contains a theoretical 'gem' … The equations are manipulated with flair and elegance that are testimony to Sachdev's talent as one of the world's premier theorists.' Physics Today'The book is well written from a pedagogical point of view and hence suitable for non-specialists. On the other hand, it can be used (some chapters) by graduate students as well.' Farruh Mukhamedov, Zentralblatt MATH'… a timely and well-informed update to the subject and provides graduate and advanced students with enough material to understand and tackle these very interesting systems.' Contemporary Physics

Describing the properties of quantum materials near critical points with long-range many-body quantum entanglement, this second edition is ideal for graduate students and researchers in condensed matter physics and particle and string theory. It contains a new introductory section on quantum phase transitions and several new chapters covering recent advances.