Hardcover with black boards and pictorial dust jacket, revised American edition (from the 15th English edition), 1485g, 1257pgs, includes 780 illustrations with 172 in colour. Book is in good condition with mild general age-related wear and tear and moderate to heavy page discolouration/spotting throughout. There is a small pen mark from a previous owner on the inside front pastedown. Boards and dust jacket are in good condition with moderate shelf wear, scuffing and chipping to corners and edges, otherwise no other pre-loved markings. Book weighs over 1kg and may incur additional postage.