General use wear, surface and edges rubbed. Corners bumped and show wear. Pages show reader wear. Minor staining to covers. Book 5 has slight waving to pages. Book 6 has a stain to front paste down and ffep and a surface tear to the ffep. Books 6, 9, and 10 have water staining to the bottom of pages with waving. Pen mark to the ffep of book 7. Crayon marking to front and back pages of book 9. Crayon markings to the cover of book 11. Surface tear to the back cover of book 13. Mixed set, copyright dates range from 1973-1978. Besides small water stains to books 6,9 and 10 the body of texts are clean and unmarked. Tight bindings. Please contact us if you need additional description or info.