The sacred blood - Michael Byrnes

The dust has barely settled in the Holy Land after a terrible raid on Temple Mount when a group of archaeologists in the Judean desert stumble upon a secret room inside a cave. Its walls are covered in Egyptian hieroglyphs and other symbols, including the curious image of a dolphin wrapped around a trident. There they discover an old clay jar, also bearing this unusual symbol, and containing an ancient scroll…
Meanwhile, a covert and ruthless sect called The Sons of Light are planning to turn the world upside down. Their ancient secret safe beneath Egyptian sands, they still need a very specific strain of DNA - the DNA from a human skeleton, 2,000 years old, stolen from beneath Temple Mount. When they discover that American scientist Charlotte Hennesey actually shares this DNA, the race begins to kidnap the girl and prepare for the final battle.