A Canticle For Leibowitz: Book One: The Saint Leibowitz Series by Walter M. Miller, 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.