"Surely You're Joking, Mr. Feynman!" - Richard Phillips Feynman, Ralph Leighton

Book Condition Guide:

Like New:  Although this book is second hand, it's previous owner showed it a lot of respect, or didn't get the chance to show it any love. 

Good:  For a second hand book, it's still in quite good condition. Minimal issues with covers and pages.

Fair:  These books have been shown quite a bit of loving, and are now showing the signs of such love. Can be issues with covers and pages. 

Damaged:  The type of damage will be listed.

Old:  These books have been around a while, so even though they've still got love to give, they may require a softer touch.