Twenty-first Edition. 224 pages. Illustrated dust jacket over illustrated paper covered boards and yellow cloth spine and lettering. Contains black and white and colour illustrations. Clean pages and illustrations with light tanning and mild foxing throughout. Binding remains firm. Boards have mild edge-wear with slight rubbing to surfaces and bumping to corners. Lettering is bright and clear. Minor wear marks to boards. Unclipped jacket. Panels and spine have light edgewear with tears and creases. Visible wear marks to spine and panels.