I’m not sure what links I followed to get to this article on Apt Adaptation: 10 Cool Converted Bookstores (otherwise I would be sure to credit them), but I’ll pass the link on regardless for your perusal. Note: the link still works but their pictures no longer load.

My favorite is the Selexyz Dominicanen Church in the Netherlands–stunning (the first in the article and the picture at the top of the post).

I remember going to the Bookstop in Houston (the second in the article and the picture below) when I lived there in the mid-90s. I enjoyed going but the uniqueness was muted after a few visits. Still, I visited it on many a night out instead of other entertainment.