Dirk Pitt returns in the extraordinary new novel from the number-one bestselling author Clive Cussler.And now he brings us his greatest adventure of all.A.D. 327, a Roman galley with an extraordinary cargo barely escapes a pirate attack. In 1916, a British warship mysteriously explodes in the middle of the North Sea. In the present day, a cluster of important mosques in Turkey and Egypt are wra…