Sarmin Publishing

• Sudoku 340 Puzzles Very Hard
• Sudoku 345 Puzzles Very Hard
• Sudoku 390 Puzzles Very Hard
• Sudoku 400 Puzzles Very Hard
• Sudoku 420 Puzzles Very Hard
• Sudoku 445 Puzzles Very Hard
• Sudoku 460 Puzzles Very Hard
• Sudoku 495 Puzzles Very Hard