The Mask of Minos: Bruno's Inferno (Harry Thursday) - Softcover

It's 1978 and Harry Thursday is vacationing in CostaRica recovering from his hapless adventure in Fatal Snow, when Sara Webster, (the sexy special agent for the BAR, a special branch of the Pentagon concerned with recovering lost and stolen treasures from WWII), lures him into a whirlwind adventure to search for the mythical Mask of Minos, a long lost artifact which has haunted civilizations from the time of the Crusades, to the Second World War and beyond.  Always on the run from the millennium old secret-society called the Hyperboreans - a group devoted to world rule for the so-called "betterment of mankind" - Harry and Sara must fight both enemy and allies alike to find the mask before it falls into the wrong hands.
Their travels take them From Costa Rica to Paris France, then by train to Bern Switzerland, leaving death and disaster behind, and finally to a haunted Greek island - the birthplace of King Minos, the son of Zeus and Europa, father of the fierce Minotaur, half man half bull, the original wearer of the legendary mask. Here they struggle to find that their worst nightmares, and possibly the fate of mankind itself, hang in the balance between good and evil, between nature and man's eternal avarice. 
The Mask of Minos is a quick read, and can be easily enjoyed even by those that didn't catch Walton's first novel - Fatal Snow. Look for the third book in the Harry Thursday series; Wish to Die, about the search for Nazi art. "Highly recommended for fans of Douglas Preston and James Rollins."