Explanation of Book Condition categories used by us: 

New:
A new book. A brand new, unused, unread copy in perfect condition. The only defects that may be present are those created during the binding of the book and even those will be mentioned if significant.

 As new (or Like new):
A book that appears to be new displaying only mild evidence that it has been read (e.g.. small creases in spine of soft covers, edge wear of dust jacket in hard covers etc.). Clean pages without marks or folds, tight spine. A book that is suitable as a gift.

 Very Good:
A copy that has been read and may have been read several times but is still in excellent condition. The spine is firm and undamaged; all pages are intact but may have bookmark folds and mild age discoloration. Mild edge wear, bumped corners, mild scuffing and creases in cover or dust jacket may also be present, these, if present and regarded as significant, will be detailed in individual book description above. There are no notations, underlining or highlighting.

 Good:
A book that has been read but is still in good condition. Spine may be creased or worn but is still firm, all pages and dust jacket (where applicable) are intact but may be aged (toned and foxed). Some edge wear of cover and jacket, cover or jacket may be creased and scuffed or bumped. Small edge tears may be present in dust jacket.

 Fair:
A worn book that has complete text pages (including maps or plates) but may have some pages clipped to remove previous owners name. The spine may no longer be firm or hinges may be very worn but there are no loose or missing pages. Pages could be discoloured (aged) but not to the extent that the book is unreadable. Jacket is missing or in poor condition.

 Poor or Reading Copy:
A book that is so worn that its only merit is the complete text, which must be legible. It may not have a dust jacket but will have all relevant pages, maps and plates. May be soiled, scuffed, stained, highlighted, notated, spotted and may have loose joints, hinges and pages. We will only offer for sale rare or out of print books in this condition and then only if we suspect that better copies are no longer available.

Defects that should always be mentioned:
Underlining,
Highlighting,
Notations, scribbles or marks,
"From the library of" labels, names in flyleaves or title page, dedications etc.
Torn, clipped, missing or loose pages,
Any significant deviation from above condition category.