The Times has an interesting article on reading differences in various regions of the UK: http://www.timesonline.co.uk/tol/arts_and_entertainment/books/article5671940.ece

Analysing library lists, it says:
Lending figures for last year suggest that southerners are slaves to Richard & Judy, flocking to their local library to borrow everything they mention. The couple’s recommended titles make up at least half of the ten […]