The Eiger sanction - Trevanian

Jonathan Hemlock lives in a renovated Gothic church on Long Island. He is an art professor, a mountain climber, and a mercenary, performing assassinations (i.e., sanctions) for money to augment his black-market art collection. Now Hemlock is being tricked into a hazardous assignment that involves an attempt to scale one of the most treacherous mountain peaks in the Swiss Alps, the Eiger.

In a breathtakingly suspenseful story that is part thriller and part satire, the author traces Hemlock's spine-tingling adventures, introducing a cast of intriguing characters-villains, traitors, beautiful women-into the highly charged atmosphere of danger. The accumulating threads of suspicion, accusation, and evidence gradually knit themselves into a bizarre and death-defying climax in this exciting, entertaining novel that will keep readers on the edge of their seats until the last absorbing page.