30 Day Book Challenge—A Book That Surprised You (good or bad)

There was a great list that circulated a few years ago...let's recreate it here. What is a book that surprised you (in a good or bad way)?
  1. The Professor and the Madman by Simon Winchester
    I had never been a big non-fiction reader up to this point, nor did I think a book about the creation of the dictionary would be interesting. So surprised! So interesting!
  2. Devil In The White City by Erik Larson
    Suggested by @petrieee
  3. Missoula: Rape and the Justice System in a College Town by John Kracauer
    Suggested by @atornberg