I'm a big fan of the Rivers of London series, but I did hesitate a little before ordering Body Work, the first of a series of graphic novels that tell additional stories to the main series. I'm not always pleased with the way an artist interprets characters, so I was not sure I would like this graphic novel.
I needn't worry. It was great. Body Work, together with its sequel Night Witch, gave me one of the most relaxing evenings of the year so far (read it while listening to Gymnopedies, the world seemed perfect for a moment). In all seriousness though, I really liked it. It is not necessary to read this for the story I guess (but I can't be sure as I haven't read Foxglove Summer yet - yes, still waiting for that right edition).
Peter and his friends investigate 'England's most haunted car'. Also, there are some very very short stories in it as well. I suppose there's one at the end of each issue, but since I read the volume edition, I can't be sure.