Ninja Assassin Sudoku: Brown Belt - Frank Longo

Take your place among the finest puzzle warriors by solving these extreme ninja sudoku. In order to reach the top levels of the assassin ranks, master the challenging techniques required to complete these fun mind-bogglers that range from hard to challenger. X-wings, Gordonian rectangle variations, and other methods are legendary among the influential puzzle warriors, who will pass them down through the generations to keep the ninja tradition alive. Solving the sudoku in this book will be rewarding and give you Brown Belt status, ready to move on to the next echelon.