<p>Are you <strong>bored with 'difficult' sudoku puzzles?</strong> Looking for an extra challenge? This book is exactly what you need. </p><p>Inside is a collection of 100 <strong>extremely, extra, super hard</strong> sudoku level 4 puzzles. Rich has done his best to handcraft the most challenging, extremely hard sudoku puzzles for you. This is for truly <strong>elite sudoku solvers</strong>. Exercise your best strategies in sudoku battle. These are so hard you might just have to google "how to solve very difficult sudoku puzzles"!</p><p>Features:</p><ul><li>One puzzle per page. Each page is large print so each grid is easy to see and there's plenty of space for you to work the puzzles. </li><li>There is a solutions key in the back, but you won't need it, right?</li><li>Great for you, the <strong>sudoku ninja</strong>, or to give as a gift for other sudoku savants in your life.</li></ul><p>Check out the other great puzzles crafted by <strong>Rich Goodwin on Amazon</strong>! He offers all other sudoku levels from introductory easy to expert hard in his Power Player Games series.</p>