158 books • 21 series
250 Hard Chain Sudoku Puzzles 5x5 (Chain Sudoku Book, #8)
250 Hard Chain Sudoku Puzzles 6x6 (Chain Sudoku Book, #13)
250 Hard Chain Sudoku Puzzles 7x7 (Chain Sudoku Book, #18)
250 Medium Chain Sudoku Puzzles 8x8 (Chain Sudoku Book, #22)
250 Easy Chain Sudoku Puzzles 8x8 (Chain Sudoku Book, #21)
250 Hard Chain Sudoku Puzzles 9x9 (Chain Sudoku Book, #28)
250 Easy to Medium Chain Sudoku Puzzles 5x5 (Chain Sudoku Book, #9)
250 Easy to Medium Chain Sudoku Puzzles 6x6 (Chain Sudoku Book, #14)
250 Medium to Hard Chain Sudoku Puzzles 6x6 (Chain Sudoku Book, #15)
250 Medium to Hard Chain Sudoku Puzzles 9x9 (Chain Sudoku Book, #30)
250 Easy Chain Sudoku Puzzles 6x6 (250 EA, #11)
250 Medium Chain Sudoku Puzzles 7x7 (Chain Sudoku Book, #17)
250 Medium to Hard Chain Sudoku Puzzles 4x4 (Chain Sudoku Book, #5)
250 Easy to Medium Chain Sudoku Puzzles 9x9 (Chain Sudoku Book, #29)
250 Easy to Medium Chain Sudoku Puzzles 7x7 (Chain Sudoku Book, #19)
250 Medium to Hard Chain Sudoku Puzzles 8x8 (Chain Sudoku Book, #25)
250 Easy Chain Sudoku Puzzles 9x9 (Chain Sudoku Book, #26)
250 Medium to Hard Chain Sudoku Puzzles 7x7 (Chain Sudoku Book, #20)
250 Easy to Medium Chain Sudoku Puzzles 8x8 (Chain Sudoku Book, #24)
250 Medium Chain Sudoku Puzzles 9x9 (Chain Sudoku Book, #27)
250 Medium Chain Sudoku Puzzles 5x5 (Chain Sudoku Book, #7)
250 Medium to Hard Chain Sudoku Puzzles 5x5 (Chain Sudoku Book, #10)
250 Easy Chain Sudoku Puzzles 7x7 (Chain Sudoku Book, #16)
250 Medium Chain Sudoku Puzzles 6x6 (Chain Sudoku Book, #12)