I revert to Agatha Christie and Georgette Heyer when I need a real comfort read.
Here the story starts with Anthony wanting to make a quick buck and being a messenger for a packet of letters and for some memoirs to be delivered to two different people. It seems straight forward enough until blackmail, murder, mysterious "foreigners", rich Americans, the CIA and the Surete all are involved and the case is not as simple as it sounds.
Set mainly at Chimneys an idyllic country retreat of Lord Chaterham who is nonplussed by the comings and goings of random people and even of the people he knows he just wants to get his peaceful house back.
Also a touch of romance with the lovely Virginia Revel who is such a fun character and game for anything that life throws at her.
Very nice Agatha Christie read.