Alexander Rodriguez

Killer Sudoku Puzzles - 400 Easy to Medium 9x9 vol.19

Killer Sudoku Puzzles - 400 Hard to Expert 9x9 vol.20

Sudoku X Puzzles - 200 Easy to Medium 9x9 vol.6

Killer Sudoku Puzzles - 200 Easy to Medium 9x9 vol.16

Killer Sudoku Puzzles - 200 Medium to Hard 9x9 vol.18

Jigsaw Samurai Sudoku Puzzles - Medium 200 vol. 2

Jigsaw Samurai Sudoku Puzzles - Easy 200 vol. 1

Puzzles for Brain Binary- 200 Easy to Expert 12x12 vol. 21 (Binary, #21)

Samurai Sudoku Puzzles - 200 Easy to Medium vol. 5 (Samurai Sudoku, #5)

Samurai Sudoku Puzzles - 200 Medium to Hard vol. 6

Samurai Sudoku Puzzles - 200 Easy to Expert vol. 8

Samurai Sudoku Puzzles - 200 Hard to Expert vol. 7 (Samurai Sudoku, #7)

Puzzles for Brain Suguru - 400 Hard to Expert 11x11 vol.16

Puzzles for Brain Suguru - 200 Hard 11x11 vol.13 (Suguru, #13)

Puzzles for Brain Suguru - 200 Easy 11x11 vol.11

Puzzles for Brain Suguru - 200 Medium 11x11 vol.12

Puzzles for Brain Suguru - 400 Easy to Medium 11x11 vol.15

Puzzles for Brain Suguru - 200 Expert 11x11 vol.14

Puzzles for Brain - Hitori 200 Puzzles 15x15 vol. 5 (Hitori, #5)

Puzzles for Brain Suguru - 200 Easy to Medium 6x6 vol. 9 (Suguru, #9)

Puzzles for Brain Suguru - 200 Easy to Medium 10x10 vol. 5 (Suguru, #5)

Puzzles for Brain Suguru - 200 Hard to Expert 6x6 vol. 10 (Suguru, #10)

Puzzles for Brain - Hitori 200 Puzzles 11x11 vol. 3 (Hitori, #3)

Puzzles for Brain - Hitori 200 Puzzles 20x20 vol. 6