If she can’t find a way to restore her mother, Rini will have more than a world to save: she will never have been born in the first place.
I don’t mind time travel, but it doesn’t work for me when it’s just thrown into the middle of a fairytale series and is seemingly out of place.
This series has a pattern, the first book established the world and characters and is set in our world.
To me it would have made more sense for this book to have been about Jack and Jill, I don’t see the need for this story, but maybe that’s just me.