In the history of medicine, popularity is mainly focused on the famous scientists such as Hipoccrates and Galen. However on the basis of positive science, maybe the most important scientist is Herophilus. The knowledge on Herophilus is rare and scattered in different testimonies and writings of authors such as Galen and Celsus. This valuable work of von Staden collects all these scattered information in one book. I think this book should be the main starting point to study ancient Alexandrian medicine, Herophilus and Herophilians. This book will not only illuminate today's knowledge but will also guide the future knowledge