James Hadley Chase - The Whiff of Money

Published by Corgi (ISBN: 055211703X) in 1981.

Back cover synopsis: "Henry Sherman was tipped to become the future President of the United States. But a blackmail note and a blue movie puts his whole career in the balance. For the girl starring in the film was his only daughter, Gillian...
So the CIA called on Mark Girland, the reluctant super-sleuth, to find her - and the three other films. His price was $20,000...but he had no idea that he would be matching himself against arch enemies - the master Soviet agent, Malik, and the killer, Lu Silk..."