A Canticle For Leibowitz  (English, Paperback, Miller Walter M. Jr)

The atomic Flame Deluge was over. The earth was dead. All knowledge was gone. In a hellish, barren desert, a humble monk unearth a fragile link to a twentieth century civilization. A hand-written document from the Blessed Saint Leibowitz reads: Pound pastrami can kraut six bagels - bring home for Emma.