I'm giving this four stars compared to all books, not compared to the first three books. I gave the first two books five stars, and I gave the third book four stars. The Princess and the Horse was still a great novel, but it paled in comparison to The Princess and the Snowbird, which wasn't quite as perfect as The Princess and the Hound and The Princess and the Bear.
This book tells the story of Fierce, who is the hound daughter of Chala. From the best of my understanding, it's in the same time period as George and Marit.
The good: Like her other books, I loved the protagonist, her love interest, and the way they fall in love. I also enjoyed the magical battles. It was nice finding out how Fierce felt when she was abandoned by her mother.
The neutral: A benefit to this book is that it can be read without having read the first three, if you happen to come across this one first. It's not necessary to know who Fierce's mother is to enjoy this book. In fact, due to the bad I'm about to mention, it might be better to read this as a standalone novel.
The bad: The rules of magic seem to change with each book. With the first three books, it made sense. We learn a little bit about the magic in the first book. The second book explains even more about all of magic. The third book, I think, is another battle of the magic and unmagic in the future, way after George and Marit's time, because Chala and the Bear (sorry, forgot his name) extended magic in time. All of this I could follow and figure out in my head.
But in this fourth novel, I have no idea how the magical battle matches up with George and Marit's time. But it must be during their time, because Fierce is Chala's hound daughter, who we briefly meet in the first novel. The magical battles are cool, but I don't understand how they mesh with the rules created in the first three novels. Maybe the fifth novel will clear things up.
Overall, it was still a great book, and I recommend it. Just be prepared to be confused if you've read the first three.