So, it's essentially a book of ancient Jewish history and culture organized by bible verses. I can see the utility of that. What contemporary sources do they use other than Joesephus, Philo and the Mishnah?
The list of abbreviations for the sources used is 7 pages long. You’ll have to look at it. Go to Amazon. Type in the title of the book. Open the “Search Inside This Book” feature. Type in “List of Abbreviations” at the “Search inside this Book” box and you’ll see a list of all the ancient the sources used.