David Smith

Binary Puzzles - 200 Hard Puzzles 11x11 Vol.11 (Binary, #11)

Suguru Puzzles - 200 Easy Puzzles 7x7 Vol.13 (Suguru, #13)

Binary Puzzles - 200 Master Puzzles 11x11 Vol.12 (Binary, #12)

Suguru Puzzles - 200 Master Puzzles 7x7 Vol.16 (Suguru, #16)

Binary Puzzles - 200 Easy Puzzles 12x12 Vol.13 (Binary, #13)

Suguru Puzzles - 200 Master Puzzles 6x6 Vol.12 (Suguru, #12)

Suguru Puzzles - 200 Normal Puzzles 6x6 Vol.10 (Suguru, #10)

Binary Puzzles - 200 Easy Puzzles 11x11 Vol.9 (Binary, #9)

Suguru Puzzles - 200 Normal Puzzles 7x7 Vol.14 (Suguru, #14)

Binary Puzzles - 200 Hard Puzzles 12x12 Vol.15 (Binary, #15)

Suguru Puzzles - 200 Hard Puzzles 6x6 Vol.11 (Suguru, #11)

Chain Sudoku - 200 Master Puzzles 9x9 Vol.20 (Chain Sudoku, #20)

Consecutive Sudoku - 200 Master Puzzles Vol.4 (Consecutive Sudoku, #4)

Consecutive Sudoku - 200 Hard Puzzles Vol.3 (Consecutive Sudoku, #3)

Mega Sudoku - 200 Normal to Hard Puzzles 16x16 Vol.6 (Mega Sudoku, #6)

Consecutive Sudoku - 200 Easy to Normal Puzzles Vol.5 (Consecutive Sudoku, #5)

Chain Sudoku - 200 Easy Puzzles 9x9 Vol.17 (Chain Sudoku, #17)

Mega Sudoku - 400 Easy to Master Puzzles 16x16 Vol.8 (Mega Sudoku, #8)

Consecutive Sudoku - 200 Normal to Hard Puzzles Vol.6 (Consecutive Sudoku, #6)

Consecutive Sudoku - 200 Hard to Master Puzzles Vol.7 (Consecutive Sudoku, #7)

Consecutive Sudoku - 400 Easy to Master Puzzles Vol.8 (Consecutive Sudoku, #8)

Mega Sudoku - 200 Hard to Master Puzzles 16x16 Vol.7 (Mega Sudoku, #7)

Consecutive Sudoku - 200 Normal Puzzles Vol.2 (Consecutive Sudoku, #2)

Consecutive Sudoku - 200 Easy Puzzles Vol.1 (Consecutive Sudoku, #1)