The students collected donations of more than 4,600 books from people throughout campus and the community that they separated into categories for the sale.
The Used Book Sale began 10 years ago when the Lindgren Child Care Center preschoolers began noticing litter when walking across the St. Cloud State University campus.
The children began the book sale as a way to collect old books and recycle them to new users. They used the funds raised through the book sale for sustainability projects, which have included recycling bins and water fill stations on campus.