Run by the ever-so-friendly Hae Yong, who can put together a decent BLT sandwich for you to munch on as you peruse the book-stuffed walls. Looking for that elusive first edition? It could be here. Hae Yong speaks excellent English and organises meals out on Tuesday evenings for foreigners and Koreans to mix. The name Nahbi means Butterfly.
It's not too far north of the East Gate (Dongmun) which was being restored at the time of writing and which lends its name to the road.