The Scarlet Letter
Nathaniel Hawthorne's Boston, and a letter worn in public.
82 cryptograms drawn from it, every one by Nathaniel Hawthorne.
How hard they are
20 easy, 38 medium and 24 hard, graded by the model described in our guide to solving cryptograms.
They average 72.6 letters over 19.2 distinct ones, with 4.1 letters appearing exactly once.