Reliquary - Douglas Preston & Lincoln Child

This is the sequel to Relic. Just when you thought it was safe to go back into the sewers of New York... Wait! When was that ever safe? If you liked Relic you'll like Reliquary. Another Pendergast novel, but not particularly order critical as long as you read Relic first. A very good adventure. You'll want to read it in a well lit room :)