A CHALLENGE FOR SUDOKU LOVER!!I know that regular sudoku is too easy and less challenging for you. This specific puzzle book contains a top-quality variety of sudoku puzzles that are guaranteed to challenge you in the best way possible. This book contains 300 puzzles Sudoku Variants in normal and hard difficulty. The following Sudoku variants are included: 150 Sudoku X and 150 Sudoku HyperFeatures: 300 Sudoku Variants Puzzle Books in normal and hard difficulty.An answer key for each sudoku puzzle Puzzles are printed on high-quality white paper, 8,5 x 11 inches paper size4 Puzzles Per Page Sudoku puzzles are a proven method for enhancing logic skills. As a logic puzzle, Sudoku is also a great brain game. If you play Sudoku every day, you'll soon begin to see improvements within your concentration and overall brain power.You could reduce your probabilities of Dementia or Alzheimer's simply by solving Sudoku puzzles. By using this selection of sudoku puzzle books you would experience enhanced brain capabilities for example focus, logical thinking, and memory. Choose your book today by clicking on the BUY NOW button at the top of this page.