Secrets of the Cave of the Patriarchs

 https://aish.com/secrets-of-the-cave-of-the-patriarchs/

A 600-page doctoral thesis composed over the past eight years by Dr. Noam Arnon, reveals and explores the details of these visits, and much more. Arnon's research covers a period of 2,500 years in the history of the site, and, like his previous works on the Cave of the Patriarchs, deals with a broad complex of geographical, geological, archaeological, and Jewish and historical sources, that were not all available to those researching the cave in the past.