Really tough sale, I'm not sure what value-add a "book store" can provide over a coffee shop.

Here's one idea: the customer pays a monthly membership. Any books they buy at the book store are shipped to the store and shelved for the customer. The customer can come in at any time and read their books or take them home. This is basically a privatized library. Maybe it could help with some of the problems libraries have.

But that's a very small niche. I'm not sure what a book store can provide that a coffee shop + kindle combination cannot.