Book Terms, or Learning Proper Terminology
It matters what you call things, especially at the higher levels. Your customers expect you to know the difference between a hinge and a joint, between unopened and uncut.
If you do not know, or you are not sure, now would be a good time to brush up on your terminology. Two good links are:
http://www.ioba.org/terms.html
http://www.abaa.org/cgi-bin/abaa/abaapages/glossary
The best all around book on the subject is Carter’s ABC for Book Collectors. Currently in it’s 8th edition, it is still the best in the business.