The Tales of Beedle the Bard is a collection of fairy tales from the Harry Potter universe. Rowling presents them as a volume edited by her character Hermione Granger, with notes from Albus Dumbledore, but you can also look at it as a surefire method to extract more money from Harry Potter fans.

I did not enjoy the stories in this book. They contain none of the wit and subversiveness of Grimm's fairy tales, and Dumbledore's literary analysis is pretty dull. I was expecting more, but my 8-year-old son liked them. Your mileage will probably fall somewhere in between.