If you're asking about a real-life prairie schoolhouse, there wouldn't be just one book. These schools would have had a library, even if it was small, with a variety of books for different ages and interests.
If you're thinking of a specific book set in a prairie schoolhouse, please provide more details. Tell me:
* What is the story about?
* What is the main character's name?
* Who is the author?
With more information, I can help you find the title of the book you're looking for!