Fair use in The Princess Diaries, Volume VII and 3/4: Valentine Princess, taken from the requisite listing at Amazon.com, which was provided to them by the requisite holder of the distribution license:

1. The image is being used for the article about The Princess Diaries, Volume VII and 3/4: Valentine Princess.
2. The image is the most logical representation of the book, The Princess Diaries, Volume VII and 3/4: Valentine Princess.
3. It is of a lower resolution than the original, and will not affect the ability to market or profit off of the book.
4. No free images of or representative of the book can be found, and does not infringe on the rights of the holders of the copyright, who either produced the image or owns the rights to the item this image illustrates, and is the source for the original said copyrighted image.
5. The image is used on a variety of websites, thus not making it significantly more accessible or visible than it already is. The book image is being used for informational purposes only, and its use is not believed to detract from the original in any way.

Cover for the Princess Diaries book "Valentine Princess"