I've already preorderd my copy! The book is called The Turnip Princess and Other Newly Discovered Fairy Tales. The English translation was done by the always excellent Maria Tatar.
You can read an interview with Tatar about the book by copying and pasting this link into your search bar:
http://www.salon.com/2015/02/21/down_and_dirty_fairy_tales_how_this_rediscovered_stash_of_darker_than_grimm_stories_destroys_our_prince_charming_myths/