I read a book about a man and his daughter. They went up a mountain to get a secret from a monastery to save it. There were murders and chases by an entity. It all culminated on a cruise ship, and was very scary but a real page turner. I think there are others in a series, but I can't remember the name of the book. Can any one help?
At a remote monastery in Tibet, a rare and dangerous artifact mysteriously disappears. Aloysius Pendergast agrees to take up the search that leads him and Constance to the maiden voyage of the Britannia--and to an Atlantic crossing fraught with terror.