"Excellent and very informative. Many well selected examples are discussed which guide a new researcher into the field. It is also a fantastic source of historical, fundamental and up to date papers and reviews (110 pages of references). This book then can be read by a beginner in the field but also by an active researcher in polymorphism, crystal engineering or crystal chemistry." -- Claude Lecomte, Acta Crystallographica, February 2021 "Joel Bernstein's book represents the single most important source for the development of critical understanding of polymorphism and its commercial and industrial importance and might well play a decisive role in categorizing and reorganizing problems and endeavours on polymorphism-related research." -- Current Engineering Practice "Clear, vigorous, well-written and very readable . There seems to be nothing relevant that Bernstein has not included; his scholarship and command and study of the vast literature are remarkable . an excellent work.

" -- Current Engineering Practice "An excellent resource book and a very good read . can be recommended strongly both for content and interest." -- Crystallographic Newsletter "A delight to review this eagerly awaited tome . In the end, the proof of the pudding is in the eating, and in my opinion, Bernstein has served us a nutritional feast here. Enjoy!" -- Cryst. Growth Des. "It will be the book, for a long time to come, to which students and researchers will turn with confidence, as well as pleasure, in all questions of polymorphism in molecular crystals." -- Structural Chemistry.