"Matysik has written a thoughtful, deeply researched, and elegantly structured intellectual history that fastens our attention on certain key chapters in the European reception of Spinoza's philosophy. When Spinoza Met Marx is an excellent book, and it deserves considerable attention from readers in modern European intellectual history and from anyone interested in the modern fortunes of Marxism and posthumanist social theory."– "Peter E. Gordon, coauthor of 'Authoritarianism: Three Inquiries in Critical Theory'"