With the exception of Paul Moraux’s Die Aristotelismus bei den Griechen (in German), the most recent books on the history of ancient Aristotelianism are H. Balthussen 2016 (The Peripatetics: Aristotle’s Heirs) and A. Falcon 2018 (Aristotelismo). Both works do not follow the chronological order followed by Moraux. This book, in turn, presents the development of Aristotelian philosophy diachronically, the first English volume that does so. The book takes a philosophical approach and presents all major philosophers against the backdrop of the most recent scholarship. The book’s chapters focus on the main characters and themes of ancient Aristotelianism: Eudemus, Thephrastus, Strato, Boethus of Sidon, the reception of Aristotle in middle Platonism (Eudorus, the anonymous author of the Didaskalikos), the masters of Alexander of Aphrodisias (Sosigenes, Herminus), Aspasius, Alexander of Aphrodisias. The book will be a must for all philosophy libraries around the world and the updated most updated reference work for any study on the topic of late antique Aristotelianism.