Gakken Staful Adult Workbook: Brain-Boosting 50-Day Puzzle 1 N05504

Train your brain a little at a time every day. This workbook for adults uses puzzles to stimulate the brain in a fun way. Contains 7 types of puzzles for searching, writing, and thinking, for a full 50 days. [Book size] B5 size W182 x H257mm [Number of pages] 61 pages [Country of manufacture] Japan [Supervised by] Professor Ryuta Kawashima, Tohoku University