You can be deceived by the bookshelf-space theory, in the US at least. Books in the US are typically sold on consignment, so the bookstores don't pay for them until they sell. That's why there is so much junk on the shelves. Some publishers pump out garbage and hope that someone is desperate enough to buy it. If not, re-pulp and repeat. It can easily be that there are only a few good books in a bookstore, and the bookstore does fine. In this environment, "the front supports the back", so they really are in the coffee and browsing business.
It should work perfectly the first time! - toma