Mr. Grex of Monte Carlo

This was a very good story of mystery and intrigue. No one would guess that the fate of Europe would be decided between a few men in a spot known only for vacation, especially when each of the men have come only for days off with their family. Hunterleys, an English M. P., is the protagonist. He has come on a mission of diplomacy, to do what he can to salvage England's future by preventing the success of the meeting, and unexpectedly finds his estranged wife there in the company of Mr and Mrs Draconmeyer, who he has forbidden her to associate with. Moreover, Mr Draconmeyer is one of the men he must frustrate for the sake of his country. Can he accomplish his mission and save his marriage? Or must he choose between the two?
The book was written just before the start of the first World War and was historically interesting because of the awareness that Germany and Russia were trying to achieve world domination and the defeat of England.