When planning your next trip, why not include a visit to a book town?
A book town is a small rural town or village in which second–hand and antiquarian bookshops are concentrated. There is even an International Organization of Book Towns.
If you are visiting any of 15 European countries, check the IOB website for book towns to include in your itinerary: http://www.booktown.net/members.html.
And see this article which highlights five book towns in Wales, Norway, Belgium, England, and Spain: http://www.atlasobscura.com/articles/booktowns-where-reading-is-the-reason-to-live/?utm_source=twitter&utm_medium=atlas-page.