Su Doku Demystified: The "How to" Book to Understand and Solve Su Doku puzzles

This book is unique amongst the many books on SuDoku. Dr. Dresnick has developed techniques to solve puzzles at all levels of complexity using deductive reasoning. Unlike many books which use look at all of the possibile locations where numbers CAN go, Dr. Dresnick's techniques are based on determining where numbers can NOT go, thus arriving at the correct number without guessing!