Orange Brain Train Sudoku Book, 9x9 Puzzles, 200 Pages, 5x8, Medium

Yellow Brain Train Sudoku Book, 9x9 Puzzles, 200 Pages, 5x8, Medium

Pink Brain Train Sudoku Book, 9x9 Puzzles, 200 Pages, 5x8, Medium

Orange Brain Train Sudoku Book, 9x9 Puzzles, 200 Pages, 5x8, Evil

Purple Brain Train Sudoku Book, 9x9 Puzzles, 200 Pages, 5x8, Medium