No Edition Stated. 258 pages. No dust jacket. Red cloth with gilt titles to front and spine. Includes illustrations throughout. From the Contemporary Science series. Publisher's adverts to front and rear. Pages are rather marked with pronounced tanning and foxing, plus thumbing. Foxing more noticeable towards the start and end of the book. Boards have some edge wear, with moderate bumping and fraying to corners, while spine ends are slightly crushed. A bit scratched, rubbed and marked overall. Spine is slightly sunned. Gilt is bright.