Sudoku Puzzles for a Sharp Mind

You don't need to be a math expert to enjoy a sudoku puzzle - so sharpen your pencils and get ready for a much needed brain-boost with this engaging collection. More than 100 sudoku puzzles with three levels of difficulty will hone your logical thinking skills. The book's size is perfect for travel or taking on the go. Keep your brain fit and your memory sharp with a variety of fun and engaging puzzles from Brain Busters. Concealed Spiral: Semi-concealed spiral is perfect for throwing in your purse without snagging things in your bag!