DeLillo has lovingly included the famous and excellent historical Gotham Book Mart in his story. It was forced to close in 2007. The real estate the store rented was obscenely expensive, and a bookstore that was cherished and obviously loved by DeLillo bit the dust to greed. It's huge inventory of priceless rare autographed books and photographs went up for auction and were donated to The University of Pennsylvania's Library. A happier ending than might have been.
NYTimes or paste in browser http://cityroom.blogs.nytimes.com/2009/01/02/gotham-book-mart-holdings-are-given-to-penn/ article
http://latimesblogs.latimes.com/jacketcopy/2009/01/keeping-the-got.html lovely article reminiscing about GBM