FBI Special Agent Aloysius Pendergast returns to the monastery where he studied martial arts and spirituality with his ward Constance Green. Constance is suffering emotionally, and Aloysius hopes the monks will help.
While they are at the monastery, a rare and extremely dangerous artifact is stolen from the monastery and sets off a chain of supernatural events that result in a rollicking thriller that doesn't slow down.
Most of the action in The Wheel of Darkness takes place on the first Atlantic crossing of the Britannia, the worlds largest and most luxurious ocean liner, creating a bit of a locked room mystery.
Preston and Child's Pendergast is a great protagonist. He has all the charm, wit and intelligence of a social butterfly combined with razor sharp intelligence and deep knowledge of just about everything. And he has the physical and mental training and strength of a samurai, trained by the above mentioned monks.
This is the 8th book in the series, which just keeps getting better.