A complete set of 4 469 grid Sudoku games, 3 books of Six-Gong Grid + Nine-Gong Grid for Beginner and Advanced, 2 books of Six-Gong Grid + Nine-Gong Grid for Beginners, 2 books of Six-Gong Grid + Nine-Gong Grid Advanced, 2 books of four-square grid + six-square grid, 2 books of Jiugongge Beginner + Advanced, Four-square grid single book with 64 pages, Six-square grid single book with 64 pages, Jiugongge primary book 64 pages, Jiugongge high-end single book 64 pages