Sudoku Formula 2: Hard Puzzles

Unlike the masses of puzzles-only books, or the books that only briefly show how to solve Sudoku, this is the first in-depth look for the average puzzle-player that shows them how to unlock the basic everyday puzzles-- and provide greater enjoyment and results.
Master gamesmith, Arnold Snyder, o [...]
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Unlike the masses of puzzles-only books, or the books that only briefly show how to solve Sudoku, this is the first in-depth look for the average puzzle-player that shows them how to unlock the basic everyday puzzles-- and provide greater enjoyment and results.
Master gamesmith, Arnold Snyder, offers simple tips and tricks to help readers solve the puzzles faster--more than seventy pages worth including easy-to-follow move-by-move solution examples--and identify the key patterns essential to success. He reveals the hidden "keys" necessary so that Sudoku players can unlock the more difficult Sudoku puzzles quickly and easily. He includes lots of tips and tricks, plus 200 new never-before-published brain workouts.