Charlie Max

• Sudoku : Vol 1 Boost Your Brain Power with Fun and Addictive Sudoku Puzzles
• Sudoku Puzzles : Vol 1 : Boost Your Brain Power with Fun and Addictive Sudoku Puzzles. the Huge Book of Sudoku
• Ultimate Sudoku Puzzles : Vol 1 : Boost Your Brain Power with Fun and Addictive Sudoku Puzzles. the Huge Book of Sudoku