Are you a sudoku warrior? Now you have an incredible opportunity to reach elite status and bask in the glory of completing some of the hardest sudoku ever constructed.
For diehards only! These incredibly difficult puzzles are handcrafted for the sudoku warrior who dares to go where other solvers fear to tread. So, if you're armed with the highest-level strategies, get ready for the most satisfying fight your life.
It's the most challenging sudoku book we've ever published!
Frank Longo is a freelance puzzle creator who lives in Hoboken, New Jersey. He has had more than 2,000 puzzles published since 1993 and written many books for Sterling, includingMaster Ninja Sudoku,Oy Vey! Sudoku, andExercise Your Mind, as well as crossword books.
![Beyond Black Belt Sudoku: If you have to ask, it's too hard for you. [Paperback]](/itemImage/2/2/1/9/2_86783.jpg)