Frank Longo

• Mensa Guide to Solving Sudoku
• Beyond Black Belt Sudoku If You Have To Ask Its Too Hard For You
• GUÍA MENSA PARA RESOLVER SUDOKUS
• Puzzlewright Guide To Solving Sudoku Hundreds Of Puzzles Plus Techniques To Help You Crack Them All
• Way Beyond Black Belt Sudoku®
• 1,036 puzzels super sudoku
• 10 x 10 Sudoku
• Absolutely Nasty® Crosswords Level 3
• Absolutely Nasty® Crosswords Level 4
• Beach Blanket Sudoku
• Big Book Of Black Belt Sudoku
• Big Book Of White Belt Sudoku