Dear Mr. [Enter Principle Name Here],
I would like to bring to your attention an issue I've seen in our school lately. There are many damaged [Specify what type of books] in this school. So much so that it has become troublesome to read these books. I understand that there might not be sufficient funds, so I also would like to suggest a fundraiser. If you would like any further explanation, please contact me.
Thank you for your consideration,
[Your Name]
[Your Grade]
[School Name]