The Vanishing — Tim Krabbe

Petrol gauge broken, anxiety and tempers flaring, young lovers Rex and Saskia pull in at a service station on their way to a holiday the South of France to refuel. As soon as they stop the tension is relieved. Rex buries two coins in a crack at the base of fence post as a secret sign of their love: Saskia goes off to buy a couple of cold drinks and vanishes. Eight years later Rex is still haunted by her. Then one day he sees scrawled in the grime on the roof of a yellow car parked below his window two lines: REX YOU ARE SO SWEET SANDRA and WHEN I WRITE THIS IT SHOWS THE PAIN...And the obsession rages in his blood again.