What to read after Kings of the Grail?

Recently discovered parchments in the Egyptian University of Al-Azhar have finally made it possible to retrace the spot where the Holy Grail has been kept for the last 1,000 years.
The authors, a medieval history lecturer and an art historian, came across the clues leading to the Grail's discovery by chance when carrying out research in Cairo. The evidence in the ancient Egyptian parchments led them on a three-year investigation as they traced the Grail's journey across the globe and discovered its final resting place in the Basilica of San Isidoro in León, Spain.
This is the definitive guide to one of history's most sought-after treasures, the origin and object of both Arthurian myth and Christian legend, offering objective information to support an extraordinary discovery, and looks back at the origins of Judaism and Catholicism, the significance of the Last Supper, and relics previously associated with the Grail.
The Kings of the Grail presents the new, definitive historical and scientific facts that have come to light, unravelling the mystery that has surrounded the Holy Grail and taking the reader on a compelling and thought-provoking journey.