Sudoku Genius: 144 of the Most Fiendish Puzzles Ever Devised;

Welcome to the 9 Circles of Sudoku Hell!
 
From Merciless to Maddening to Murderous, this is a book to challenge even the most seasoned Sudokuist. By the end of this book, you’ll be a Sudoku Genius.
 
With 144 puzzles (and solutions) and an advanced strategies master class from puzzle expert Tom Sheldon, Sudoku Genius includes logical strategies such as:
 
·         The Force (and its variant, the Pincer)
·         Channeling
·         Completing the Square

With these strategies in your arsenal, you’ll have everything you need to solve these puzzles—if you dare to take the Genius challenge.