Oh, boy! This is right up my alley-The Turnip Princess and Other Newly Discovered Fairy Tales.

Here's a link to the complete NPR review of the book, but this introduction should be enough to whet your appetite:
Long ago in far Bavaria, Franz Xaver von Schönwerth went hunting for fairy tales. However, the collection disappeared, and his work was thought lost forever. Then in 2009, cultural curator Erika Eichenseer discovered five hundred of them in what one assumes must have been the deepest, darkest, most perilous basement of a municipal archive, and all those stories came to life again.