The Tales of Beedle the Bard, being a collection of five wizardly fairy tales with additional commentary by Albus Dumbledore, is more interesting for its insights into the workings of the wizarding world than for the stories themselves, which, while sweetly authentic, are fairly standard fantasy fairy tale fare. There are glimpses of the Hogwarts dramatic scene, information on wandlore and, most interestingly, demonstrations of the wit and humour of Dumbledore himself. This in particular made me laugh:
"This exchange marked the beginning of Mr Malfoy's long campaign to have me removed from my post as Headmaster of Hogwarts, and of mine to have him removed from his position as Lord Voldemort's Favourite Death Eater."
This little book is a worthy addition to the Harry Potter canon; if you liked Fantastic Beasts and Where to Find Them and Quidditch Through the Ages, you'll probably like this.