WHEN SALADIN TOOK JERUSALEM, THE HOLY GRAIL WASN'T THERE...In 1936, Cliff Parish is forging crystal skulls to make ends meet. But he's also a prolific adventurer and expert on archaeology and history, hired by affluent customers to find artifacts for their personal collections. In Yucatán, a mysterious man shows him a map. Rumor has it, the map gives away the location of the famous city of El Dorado. Cliff knows this treasure hunt promises more than just ordinary gold. But he's not the only one hunting those treasures. And what they discover continues a journey begun in 1187 AD. When Saladin's armies captured the Holy City from the Crusaders.