Keep your mind sharp and improve your concentration with a puzzle la day!
With 365 number puzzles, including Sudoku, Addoku, Kakuro, Binary and Lotus, this book contains everything you need to focus and stimulate your mind all year round.
With 365 number puzzles, including Sudoku, Addoku, Kakuro, Binary and Lotus, this book contains everything you need to focus and stimulate your mind all year round.