Interesting challenging and fun trivia and facts stuffed into 500 cryptoquotes. Extra large page format for plenty of room to work out the solutions. All puzzles are based on letter replacement and hints are in the center of the book. Huge collection of cryptograms to entertain for hours. Fascinating things you never knew and will have fun discovering by working each puzzle. Extra large font size is easy on the eyes. Multiple levels of difficulty. Carefully made by lovers of cryptograms. The ultimate crypto challenge from start to finish. Makes a great gift for avid cryptogram players and those who want to start.