Daniel Silva: Ransom, Harper Collins, available,

Vintage reliable Gabriel Allon material, practising his art resoration brilliance on old masters again,  only to be whisked away from his Cornwall estate by a pleading billionare whose wife has disappeared during a weekend away with her girlfriends. 

In true Allon fashion the search for her unravels a lot of questionable activities, intrigues and secrets,  no more details as it would spoil this perfect beach read.