The Strand is such a hipster cool hangout for the intellectuals of all ages. All types of books of all walks of life. Whenever I pass by I have to walk in just to see what catches my eye. It truly is the best used bookstore with the best discounts. Don't forget the shelves of books outside surrounding the store that sells for only $1.
Its so worth to pick a $1 book up when you realize you have an hour before you meet someone or you need a book for the train ride home.
Since some of these books are from way back when...you'd be surprised at the selection and the great find of an interesting read.