Reddit mentions of The Witch of Cologne

I'll throw in another vote for the Hunger Games trilogy, and the Sookie Stackhouse series isn't bad. If she enjoys supernatural fluff lit, then perhaps Patricia Briggs might be another good choice.

Some of my favourites:

• The Hummingbird's Daughter
  
• The Witch of Cologne
  
• Calculating God
  
• Running with Scissors: A Memoir