1969. No Edition Remarks. 160 pages. No dust jacket. The Tom Swift Science Adventures Series. Pictorial paper-covered boards. Contains black and white illustrations. Pages are heavily tanned with moderate foxing to endpapers and text block edges. Water staining on pages 18-19, with liquid marks, rubbing and a few small nicks along text block edge. Minor dog-eared corners. Boards have moderate shelf-wear with notable bumping to corners and rubbing to surfaces. Moderate tanning and foxing to spine and edges, with visible crushing to spine ends. Book has a pronounced forward lean. Water staining to upper edges.