The Light of Day was the basis for Jules Dassin's classic film,
Topkapi*.*
When Arthur Abdel Simpson first spots Harper in the Athens airport, he
recognizes him as a tourist unfamiliar with city and in need of a
private driver. In other words, the perfect mark for Simpson's brand of
entrepreneurship. But Harper proves to be more the spider than the fly
when he catches Simpson riffling his wallet for traveler's checks. Soon
Simpson finds himself blackmailed into driving a suspicious car across
the Turkish border. Then, when he is caught again, this time by the
police, he faces a choice: cooperate with the Turks and spy on his
erstwhile colleagues or end up in one of Turkey's notorious prisons. The
authorities suspect an attempted coup, but Harper and his gang of
international jewel thieves have planned something both less sinister
and much, much more audacious.