Grail — Philip Michaels

THE SEARCH FOR THE HOLY GRAIL HAS ENDED
For nearly 2,000 years since the blood of the crucified Christ was collected in it, the most sacred relic of Christendom was hidden from the world. Sealed in a Vatican vault, it was kept secret even from the popes. Now it has been found, sent to a Boston museum for scientific testing...

AND THE END OF MANKIND HAS BEGUN
As helpless millions cower behind locked doors, the police and FBI confront an onslaught of horror that defies belief. While those few who now know the loathsome power of the Holy Grail -- the priest whose faith cannot save him, the beautiful scientist who too late discovers the terrifying truth, and the police inspector who would sacrifice his life for hers -- are struggling desperately against a nightmare forgotten since the dark millennia when man feared the night.