Buchhandlung Ludwig

Located inside the central station: good spot for killing time while waiting for a train (the Douglas on the other side is also a good spot for this but less intellectual). Good selection of international press (I found le monde diplo, charlie hebdo, le monde) and a very good selection of books in English (classics, fiction and non fiction, last time I visited they had several books by Chomsky). The selection in French is less good, though, mostly current 'navets' and translations.

This bookstore is located inside Cologne's main train station (Hbf) and we went there yesterday while waiting for our train back to Frankfurt. The store is large and it has a terrific selection, with the exception of too few photography & art books. Also, everyone working there was very friendly and helpful.