We don't. Now that the internet is a thing [0], you wouldn't have too many writers even if every person on earth wrote a hundred books each. The only problem is

We don't. Now that the internet is a thing [0], you wouldn't have too many writers even if every person on earth wrote a hundred books each. The only problem is that there is (AFAIK) no good place for discovering books / searching for books based on anything but the coursest categories, and the long tail of less popular books is more-or-less completely hidden. This is something that I find rather peculiar, since these days many social media sites are rather eager to expose you to the long tail of less popular content in your extremely specific preferred niches, so why doesn't any service do the same for books? I, as a reader, would be very interested in something like that, instead of seeing the same books-du-jour everywhere I go. [0] Because it removes the physical / logistical limitations that bookstores and libraries have, forcing them to only offer the most popular books, and because it allows for targeting and extreme selectiveness.