I'm reading "A Canticle for Leibowitz"
(I had to look up "canticle," it means a song based on a Psalm from the bible. I feel so secular.). It is a post apocalyptic story about southwestern monks who preserve what writing and knowledge they can protect in the dark ages after an atomic holocaust. I'm realizing it spans a much greater time than I thought when I began to read, and is turning out to be rather gripping.