Name: The Princess and the Pig
ISBN: 9780802723345

Jonathan Emmett

When a new baby princess accidentally changes places with a piglet, both of their lives are forever changed.

The Princess and the Pig

Ana V. 

Awesome story and awesome illustrations. 

There's a swap and the princess grows up with another family, while the little pig grows up as a princess. They can't "undo" this curse and turn the princess into a human 'again', because there's no such thing as a curse to be undone. It's funny, well written and very clever. I really love this book.