Samurai Sudoku: 500 Hard Sudoku Puzzles Overlapping into 100 Style: 7 (Logic Series)

Samurai Sudoku: 500 Medium Sudoku Puzzles Overlapping into 100 Style (Logic Series)

Samurai Sudoku: 500 Hard Sudoku Puzzles Overlapping into 100 Style: 2 (Logic...

Samurai Sudoku: 500 Hard to Extreme Sudoku Puzzles Overlapping into 100 Style:...

Samurai Sudoku: 500 Easy Sudoku Puzzles Overlapping into 100 Style: 11 (Logic Series)