boards : Common term for the covers of a hardbound book.

8vo : Short for Octavo, A book whose page size is approximately 8-10 inches tall. The size is based on a sheet of paper 25 inches by 38 inches, the size of paper traditionally used by book printers, which has been folded and cut into 16 pages.. Unfortunately often misunderstood to mean 8 volumes.

bookplate : A device (often decorative) affixed to the book, usually on the endpapers, which designates ownership (or former ownership).

pastedown : The paper glued to the inside cover of a hard cover book.