Over 300 Hard or Difficult Sudoku puzzles! You don't need to be a math whiz to enjoy a great Sudoku puzzle. Whether relaxing after a hard day or to sharpen your mind, Sudoku puzzles are great. This puzzle book has: - Wide center margins which make it easier to work on the puzzles - Larger than average font making the puzzle easier to solve - 4 puzzles per page and all the solutions are provided - Hundreds of hours of fun This book is perfect for:Curious adults wanting to try out this type of puzzle Filling in time while traveling A gift for anyone - birthdays, Christmas, stocking stuffers Pick up this puzzle book, take a break and do a little puzzling! Your brain will thank you!