Canticle for Leibowitz by Walter Miller

Published in 1959. A classic post-apocalyptic novel that follows a Catholic monastic order dedicated to preserving scientific knowledge after a nuclear holocaust. They meticulously re-copy textbooks from the "before" with illuminations, akin to historical medieval monks. The story delves into the cyclical nature of history, as civilization re-learns, and repeats, the same mistakes. don't get the audible version, read it as a book.