https://io9.gizmodo.com/5449841/a-canticle-for-leibowitz-is-divine-but-its-the-opposite-of-science-fiction
http://www.tor.com/2010/12/07/dark-ages-and-doubt-walter-m-millers-a-canticle-for-leibowitz/
https://www.goodreads.com/book/show/164154.A_Canticle_for_Leibowitz
http://www.newyorker.com/books/page-turner/science-fiction-classic-still-smolders
http://entertainment.time.com/2010/06/08/top-10-post-apocalyptic-books/slide/a-canticle-for-leibowitz/
