1985 USA Mint Set of Commemorative Stamps in Book (Book a bit damaged)

1985 USA Mint Set of Commemorative Stamps in Book. Includes 27 stamps and accompanying mounts to adorn the pages of this illustrated, softcover book describing the themes behind each stamp. The covers are scratched and the back has a small tear; the last two pages have minor damage at the bottom. The envelope also has a small tear.