We have been reminding students all week that they will be on vacation for eleven days and some won't have a libary class again until January 8th. That's a long time to have a library book checked out.
The best place to keep your school library book is right in your backpack. Take it out to read and enjoy during vacation, but when you are done with it, pop it right back in that backpack. That way when school does start again, you will be ready to come back and return your library book.