Evolution of the Water Supply through the Millennia, published by the International Waster Association Publishing, presents the major achievements in water technologies and management, providing valuable insights into ancient water technologies. The book was co-edited by Mays along with Andreas Angelakis, Demetris Koutsoyiannis, and Nikos Mamassis. This book was part of the continuing effort by Mays in his study of ancient water systems and the relation that these systems could have on solving present and future problems of water resources sustainability, particularly for the poor, using the concepts of traditional knowledge.