Terry Pratchett’s: Reaper Man.  

The Auditors of Reality watch the Discworld to ensure everything obeys The Rules. As Death starts developing a personality the Auditors feel that he does not perform his Duty in the right way. They send him to live like everyone else. Travelling to the Octarine Grass Country, he assumes the name "Bill Door" and he works as a farm hand for the elderly Miss Flitworth. She is a spinster whose fiancé, Rufus, died on a last smuggling expedition many years ago. There are rumours that he had had second thoughts about their marriage but she does not believe them.