121 books • 18 series
Sudoku Jigsaw Puzzle Books - 400 Easy to Master Puzzles 10x10 (Volume 9) (Sudoku Jigsaw Puzzle Books, #9)
Binary Puzzle Books - 400 Easy to Master Puzzles 13x13 (Volume 14) (Binary Puzzle Books, #14)
Binary Puzzle Books - 400 Easy to Master Puzzles 11x11 (Volume 12) (Binary Puzzle Books, #12)
Calcudoku Plus Puzzle Books - 400 Easy to Master Puzzles 9x9 (Volume 10) (Calcudoku Plus Puzzle Books, #10)
Calcudoku Plus Puzzle Books - 400 Easy to Master Puzzles 5x5 (Volume 6) (Calcudoku Plus Puzzle Books, #6)
Binary Puzzle Books - 400 Easy to Master Puzzles 8x8 (Volume 9) (Binary Puzzle Books, #9)
Calcudoku Puzzle Books - 400 Easy to Master Puzzles 6x6 (Volume 7) (Calcudoku Puzzle Books, #7)
Calcudoku Puzzle Books - 400 Easy to Master Puzzles 9x9 (Volume 10) (Calcudoku Puzzle Books, #10)
Calcudoku Puzzle Books - 400 Easy to Master Puzzles 7x7 (Volume 8) (Calcudoku Puzzle Books, #8)
Calcudoku Plus Puzzle Books - 400 Easy to Master Puzzles 8x8 (Volume 9) (Calcudoku Plus Puzzle Books, #9)
Binary Puzzle Books - 400 Easy to Master Puzzles 10x10 (Volume 11) (Binary Puzzle Books, #11)
Calcudoku Puzzle Books - 400 Easy to Master Puzzles 8x8 (Volume 9) (Calcudoku Puzzle Books, #9)
Calcudoku Plus Puzzle Books - 400 Easy to Master Puzzles 6x6 (Volume 7) (Calcudoku Plus Puzzle Books, #7)
Calcudoku Plus Puzzle Books - 400 Easy to Master Puzzles 7x7 (Volume 8) (Calcudoku Plus Puzzle Books, #8)
Calcudoku Puzzle Books - 400 Easy to Master Puzzles 5x5 (Volume 6) (Calcudoku Puzzle Books, #6)
Binary Puzzle Books - 400 Easy to Master Puzzles 12x12 (Volume 13) (Binary Puzzle Books, #13)
Binary Puzzle Books - 400 Easy to Master Puzzles 9x9 (Volume 10) (Binary Puzzle Books, #10)
Suguru Puzzle Books - 400 Easy to Master Puzzles 11x11 (Volume 15) (Suguru Puzzle Books, #15)
Suguru Puzzle Books - 400 Easy to Master Puzzles 12x12 (Volume 16) (Suguru Puzzle Books, #16)