We're not talking about rooms that are just full of books. We're talking about bookshops in barns, disused factories, converted churches and underground car parks. Bookshops on boats, on buses, and in old run-down train stations. Fold-out bookshops, undercover bookshops, this-is-the-best-place-I've-ever-been-to-bookshops. Meet Sarah and her Book Barge sailing across the sea to France; meet Sebastien, in Mongolia, who sells books...