500 Challenging and fun puzzles to keep your cognitive ability in top condition. Extra large font is easy to read and lots of room to write on each page. Letter replacement cryptograms are great for focus and mental clarity. The bonus with these cryptograms is that they are filled with inspiring quotes and positive affirmations. A great way to start or end the day with positivity. Carefully crafted puzzles are at different levels of ability but all are great for cryptoquote puzzle workers. Quotes are from people from all walks of life and some are quotes without a known author....but all will inspire and uplift you. All puzzles have hint pages and if you get stuck each cryptogram answer is included. Large book size 8.5 x 11 inches. 261 pages. Makes a great gift for cryptogram puzzle lovers.