I like this Barnes & Noble also. It's conveniently located: close to Clarendon Metro and there's also plenty of parking on the street or in lots nearby. The store is larger than the one in DC, better organized, and the staff is pretty helpful. They have what you'd expect. For hard-to-find titles, you may be better going elsewhere or ordering online.
PROS: Location, Large Store
CONS: Run-of-the-Mill Stock
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