This is a book of letters. It contains a 20 year correspondence (1949-1969) between Helene Haff, an American freelance writer and Marks & Co., a book store on 84, Charing Cross Road at London. The author’s love for books and especially out-of-print books makes her respond to an ad placed by Marks & Co in a literary magazine. Her first letter requesting a set of books gets a prompt response from the book store and that’s how a 20 year correspondence starts.