Shakespeare and Company is a very nice bookshop. You should visit it if you are ever in Paris. It is a vestige of that whole era of Anglo-American expats having cigarettes at Left Bank coffee tables and being disillusioned.
Interiors:
http://www.flickr.com/photos/tags/shakespeareandcompany/ It is a skip and a jump (over the Seine) from the Notre Dame Cathedral. They also offer wayward English-speaking travelers a place to stay in exchange for work.