The product is a set of homeschool books, readers specifically designed for fourth-grade students. Published by Pensacola Christian College, the materials are authored by Abeka and consist of books in a traditional book format. The focus of the curriculum is on reading materials, making it a valuable resource for homeschooling students in the fourth grade. These were used by my son last year and are still in good condition. Only one book is filled in Im the back. We have lost the first two books in the series. We are serious sellers shipping daily. We ship from a smoke free home and appreciate your support of our small family business.