I’ve been trying to figure out the title and author of this childhood  ‘book memory’ my brother has for the past 3 years. If you are able to solve the mystery, it would be a “Christmas Miracle”!! 🎄

Here is the memory:

“All the illustrations were in blues and greys. It was about a boy, I think with a number of brothers, and the brothers were possibly changed into animal shapes, or possibly it was princesses changed into animal shapes. I think there was a sorceress or magician. And there were pictures of horses? And maybe dogs?”