In the absence of the bookshop, is Shakespeare & Co., the next best alternative. It has a very different vibe from Gotham--trendier (and I say this with gritted teeth) and much beloved by tourists because it has marketed itself incredibly well. Quite unlike Gotham which prided itself with a quiet dignity (okay, they could be a little snooty). I'm being cynical and bitter because one beloved bookshop closed but that shouldn't mean I should condemn the other.
Shakespeare & Co. is a worthy institution (original owner Sylvia Beach published James Joyce's Ulysses when nobody wanted it) and proof that people still read books and love them. Everyone is friendly there and you're more than welcome to sit and read for hours. There are writers-in-residence living upstairs in return for service in the bookshop and the upper tier showcases letters from fans all around the world.
I come here every time now. Just in case. But there seems to be no sign of this bookshop ever letting up, thank god. Please don't go in the summer -- it really is like making a holy pilgrimage to Jerusalem or Mecca--crowded, sweaty and frustrating.