The book is carefully and clearly written, and the arguments are presented in a fair and even-handed way … [It] is certainly suitable for use as a textbook in graduate seminars on the metaphysics of parts and wholes, but it is also accessible enough that it could also be used in upper-division undergraduate metaphysics classes. Philosophers who are curious to see what some of the main issues in the metaphysics of parts and wholes are would also profit from reading this book.