Jonathan Hemlock, who appeared in Trevanian’s earlier novel, The Eiger Sanction (which was filmed by Clint Eastwood), is a retired American art professor and world-famous critic. But he had a secret life as a “counter-assassin” for an espionage agency referred to, not so subtly, as the “CII.” He hated both his employers and his targets, but the job made it possible for him to indulge his passion for collecting Impressionist masters. As The Loo Sanction begins (1973) he’s retired and spending a year in London on a cultural visit for the embassy.

Then he’s kidnapped by a British Intelligence agency known as “the Loo,” roughly equivalent to the one he used to work for. He doesn’t want to work for them, but is extorted into doing so by threats against people he likes.

His job, he’s told, is to steal a package of films, films made secretly at an ultra-secret London sex club. The owner of these films will be in a position to blackmail the entire British government into doing what he wants (Jonathan can almost see the head of the Loo – the most hypocritical Church of England vicar imaginable – salivating at the prospect of controlling them).

Jonathan will come up against a formidable enemy, a grandiose crime lord who is both an aesthete and a sadist. Along with a supporting cast of equally appalling psychopaths. He will barely survive.

A lot of people won’t survive. Generally, the better you like a character in this book, the more likely they are to die horribly.

Trevanian can be amusing in his acerbic comments, at least when I agree with him. But the story of The Loo Sanction is a story of unremitting cynicism, where every ideal is laughable and all institutions are not only corrupt but satanically vile. The plot gets crueler and crueler as it goes along, and finally ends in Hell.

I have rarely disliked a book as much as I disliked The Loo Sanction. I’m not even going to link to it on Amazon. Someone depressed or suicidal could possibly happen on it, and I don’t want to risk the consequences.