The Big Four - Agatha Christie, Hugh Fraser

"And it is in this out of the way spot the Big Four have their rendezvous?"

"Say, rather, their headquarters. The signal has been given, and it´s their intention to disappear from the world and issue orders from their mountain fastness. [...]  I am prepared to. swear that a vast subterranean dwelling has been hollowed out in the very heart of the mountain, secret and inaccessible. From there the leaders of the organisation will issue by wireless their orders to their followers who are numbered by thousands in every country. And from that crag in the Dolomites the dictators of the world will emerge. That is to say, they would emerge , were it not for Hercule Poirot."

 

There are so many silly things in this book, but somehow the underground liar makes everything else seem normal in comparison.