I love the Dick Francis novels as well, they are as you say Sara, full of all sorts of information, and the amount of background investigation which goes into them must be tremendous. There seems to be a lack of them at our local library, and I would assume that that is because they are so popular, and perhaps some are not even being re-printed. Felix does a good job, and good luck to him.
To think that London, or anywhere else for that matter, does not belong to any one demographic
Adult early 30's - very difficult.