Alexander Rodriguez

Killer Sudoku 9x9 Puzzles - Easy to Medium 200 vol. 10 (Killer Sudoku, #10)

Shikaku Puzzles 9x9 - Expert 200 vol. 4 (Shikaku Puzzles, #4)

Straights Puzzles 9x9 - Easy to Medium 400 vol. 6

Shikaku Puzzles 9x9 - Medium 200 vol. 2 (Shikaku Puzzles, #2)

Shikaku Puzzles 9x9 - Hard 200 vol. 3

Straights Puzzles 9x9 - Easy to Expert 400 vol. 8 (Straights Puzzles, #8)

Straights Puzzles 9x9 - Hard to Expert 400 vol. 7

Straights Puzzles 9x9 - Easy to Expert 400 vol. 5 (Straights Puzzles, #5)

Sudoku X 400 Puzzles - Easy to Expert vol.5

Shikaku Puzzles 9x9 - Easy 200 vol. 1 (Shikaku Puzzles, #1)

CalcuDoku Puzzles 6x6- Easy 200 vol. 6

CalcuDoku Puzzles 6x6- Hard 200 vol. 8 (Calcudoku Puzzles, #8)

Rossini Sudoku Puzzles - Expert 200 vol. 4 (Rossini Sudoku, #4)

Rossini Sudoku Puzzles - Hard 200 vol. 3 (Rossini Sudoku, #3)

Rossini Sudoku Puzzles - Medium 200 vol. 2 (Rossini Sudoku, #2)

CalcuDoku Puzzles 6x6- Expert 200 vol. 9 (Calcudoku Puzzles, #9)

Rossini Sudoku Puzzles - Easy 200 vol. 1

CalcuDoku Puzzles 6x6- Medium 200 vol. 7

CalcuDoku Puzzles 9x9 - Expert 200 vol. 5

CalcuDoku Puzzles 9x9 - Medium 200 vol. 3

Akari Puzzles 9x9 - Hard 200 vol. 3

CalcuDoku Puzzles 9x9 - Easy 200 vol. 2

Akari Puzzles 9x9 - Expert 200 vol. 4 (Akari Puzzles, #4)

CalcuDoku Puzzles 9x9 - Hard 200 vol. 4 (Calcudoku Puzzles, #4)