Mark Hartz

• Beautifully Elegant Sudoku Puzzles
• Big Print Sudoku Easy
• Easy to Moderate Sudoku
• Easy to Moderate Sudoku : Volume 2
• Enjoyable Sudoku
• Enjoyable Sudoku : Volume 2
• Enjoyable Sudoku : Volume 3
• Large Grid Sudoku - Level D
• Large Grid Sudoku - Vol. E
• Large Grid Sudoku - Volume 17
• Large Print Sudoku
• Large Print Sudoku - Moderate Puzzles