Hard Sudoku for Adults is a fantastic compendium that includes 100 puzzles to test your mind! Become an all-around puzzler and improve your sudoku and brain game skills. The perfect way of improving your mental agility, and problem-solving skills, this puzzle book will provide you with hours of mind-sharpening fun!100 PUZZLES & SOLUTIONS: Hours of fun and entertainment to enjoy, including solutions for each challengeMAKES A GREAT GIFT: For the novice to expert, this word search book makes a great gift!Order your book today and enjoy it!