SUDOKU AND VARIANTS SUPER CHALLENGE 200 PUZZLES

From the original publisher of daily Sudokus in the United States, USA TODAY presents a collection of Sudoku puzzles in four difficulty levels, along with fun Sudoku variants, such as Sudoku X and Sudoku mini puzzles.

USA TODAY Sudoku and Variants is a collection featuring Sudoku puzzles in four difficulty levels from USA TODAY—the nation's no. 1 newspaper, plus Sudoku X and Sudoku mini puzzles to round out the collection.

Features include:

• Introductory how-to section
• 200 total Sudoku puzzles
• Comprehensive answer key