Books are in good used condition. They shows signs of wear and use. The larger book Design of wood structures asd the top side is a little marked up, minor see pics. Pages are fine. All books come as seen in pics. Any questions just ask. There good books in used condition. 1. Design of wood structures ASD 4th edition. 2. Engineering the city 3 & 4. Mechanics of materials 2nd Edition volumes 1 and 2. Lot of good information in all three books. These came from a professor of civil engineering.