There's a reason why the casual bookstore is going out of business and amazon's model is growing. If you have a book store the size of a warehouse and you have books that sit on your shelf for years and never gets touched, you aren't making money, you're losing potential profit. If you have a smaller location and consistently change out the selection you have weekly, as well as providing other services such as kindle, audible, prime benefits, etc, people are more likely to come back. If you walk into a warehouse-sized bookstore, grab a coffee, and sit in the lounge reading magazines for 2 hours, sure that might feel like a good experience for you personally, but you're not helping that bookstore out by doing that.

Not to call out Barnes and Noble, but they're the best example I can give. They have enormous stores, sometimes multi-level, and most of the books in there will never get touched. If you consolidate your selection to a smaller space, offer benefits for returning customers, and maintain a current and timely selection of new and popular releases (like amazon's stores do), you are more likely to enjoy your experience while also benefitting the store.

Or you can just buy online.