A collection of tales. From oral collection, and also from manuscript versions -- many of those, predating the Brothers Grimms, are pious tales. Several, the king is King Solomon or King David. Still, for most of them are distinctly fairy tales.
The title story, for instance, is a variant of the same tale type as The Feather of Finist the Falcon. We also have Donkey Cabbages, the Golden Bird, the Horse of Power, and more. (You have to know your tales -- its appendix only compares two of them to Rapunzel and Cinderella, and the later is actually more like Love Like Salt.)
An interesting collection with a number of unique takes on the types.