The deceivers / Harold Robbins ; [in a posthumous collaboration with] Junius Podrug.

Enhanced descriptions from Syndetics:

The knock on the door of struggling art expert Madison Dupre's low rent New York apartment is that of a Thai café deliveryman--but instead of succulent noodles, he has a rare work of art from the incredible Angkor Wat in the jungles of Cambodia.
Angkor Wat, a wonder of the ancient world, is considered by many antiquity experts to be even more majestic than the monuments of the Egyptian pharaohs.  Left unprotected, the vast complex has been a treasure trove for thieves who mercilessly cut off pieces, mutilating thousand-year-old sculptures with chainsaws.
Madison knows there is no possibility that this artifact could have been acquired legally.  That knock on her door sends her to one of the most dangerous places on the planet: Phnom Penh, the sex-sin-drug capital of the Far East.
Stepping into a cauldron of murder and antiquity-looting that takes her from New York to Cambodia, Hong Kong to Thailand, Madison keeps one step ahead of temple robbers who kill as easily as they steal.  She finds comfort in the arms of a soldier of fortu≠ tangles with a Russian model and her stud "bodyguard," who introduce her to the New Eroticism; and gets entangled with a Cambodian prince whose sex moves not even the worldly Madison had tried.   But how much is Madison willing to sacrifice in order to protect her priceless, irreplaceable antiquities...'