First Editions, First Printings. Four Volumes, complete. Very rare thus. Overall, a wonderfully clean set of these famous Jamboree puzzle, activity, and brain teaser books. Richly illustrated and a fantastic example of 1970s design. Content fine; exceptionally clean, bright and unmarred. Very good plus stiff, pictorial soft covers with some wear and rubbing to the spines (volume 2 the most) and slight, shelf edge wear. 4to. A wonderful set for anyone who enjoys games and puzzles.