I recently completed this, the seventh cover for the "Sunday Supper Club" series by UK author Alexander McCall Smith.
For this one, the setting is rural Scotland.  The art director and author usually give me a variety of elements to play with; often they include very specific, regional items and landscape reference.  At left is the back cover art, which features a sporan - sort of the old Scottish version of the modern day fanny-pack.  Below are the previous covers.
 
The challenge is always to simplify.  That and deal with the rather unforgiving design that I created way back for the first book, before I knew this would be a series!  I still have yet to read one of these books, but I look forward to getting the whole series as they seem to be quite popular in the UK and Europe.

I know every one has been putting up "process posts" lately, but there's not much for me to share here.  Basically, I paint with ink on board, scan it, color in PS.  I'd take photos but my camera is broken.  Besides, everyone here knows how to do this already!