Alexander Rodriguez

Puzzles for Brain - CalcuDoku 200 Easy Puzzles 5x5 vol. 24

Puzzles for Brain - CalcuDoku 200 Medium Puzzles 5x5 vol. 25

Puzzles for Brain - CalcuDoku 200 Expert Puzzles 5x5 vol. 27

Puzzles for Brain Binary - 200 Hard to Expert 14x14 vol. 28 (Binary, #28)

Puzzles for Brain Binary - 400 Hard to Expert 14x14 vol. 30

Puzzles for Brain - CalcuDoku 200 Hard Puzzles 5x5 vol. 26

Puzzles for Brain Binary - 400 Easy to Medium 14x14 vol. 29

Puzzles for Brain Binary - 400 Hard to Expert 13x13 vol. 26

Puzzles for Brain - CalcuDoku 200 Medium to Hard Puzzles 7x7 vol. 29 (Calcudoku, #29)

Puzzles for Brain Binary - 200 Easy to Medium 14x14 vol. 27 (Binary, #27)

Puzzles for Brain - Chain Sudoku 200 Easy to Medium Puzzles 7x7 vol.5 (Chain Sudoku, #5)

Puzzles for Brain - Chain Sudoku 200 Hard to Expert Puzzles 9x9 vol.10 (Chain Sudoku, #10)

Puzzles for Brain - Chain Sudoku 200 Hard to Expert Puzzles 5x5 vol.2 (Chain Sudoku, #2)

Puzzles for Brain - Chain Sudoku 200 Hard to Expert Puzzles 8x8 vol.8 (Chain Sudoku, #8)

Puzzles for Brain - Chain Sudoku 200 Hard to Expert Puzzles 7x7 vol.6 (Chain Sudoku, #6)

Puzzles for Brain - Chain Sudoku 200 Easy to Medium Puzzles 8x8 vol.7

Puzzles for Brain - Chain Sudoku 200 Easy to Medium Puzzles 6x6 vol.3

Puzzles for Brain - Chain Sudoku 200 Easy to Medium Puzzles 5x5 vol.1

Puzzles for Brain - Chain Sudoku 200 Hard to Expert Puzzles 6x6 vol.4 (Chain Sudoku, #4)

Puzzles for Brain Tents - 200 Easy Puzzles 9x9 vol. 1

Puzzles for Brain Tents - 200 Hard Puzzles 9x9 vol. 3

Puzzles for Brain Tents - 200 Medium Puzzles 9x9 vol. 2

Puzzles for Brain - Chain Sudoku 200 Easy to Medium Puzzles 9x9 vol.9 (Chain Sudoku, #9)

Puzzles for Brain Tents - 200 Medium Puzzles 10x10 vol. 6 (Tents, #6)