Looking for mental stimulation, hoping to ward off brain fog, or wanting an enjoyable way to expand your knowledge? Challenge yourself and test your mind with 90 days of crossword puzzles that progress from easy to hard-all while having fun! With helpful tips for getting unstuck and bonus puzzles to keep your good habit going, you'll be amazed at the improvement in your recall, focus, and mental dexterity in just three short months. Have fun with engaging clues and creative themes. From pop culture and wacky wordplay to history, music, and literature, there's something to interest everyone. Includes helpful crossword-solving techniques. Become a crossword-solving pro with top tips from our expert authors.