Oh! your looking for the The Elders of Zion.
You can easily find “The Elders” on Mount of Olives. Many of the elders are located on Mount of Olives, also know in Hebrew as Har Hazeitim. You can visit the Mountain In Jerusalem simply by booking a flight and hiring a tour guide. Maybe you can find some answers there. Be sure to bring some candles.
As for the book, I wasn’t aware that they published a book
about the Elders.