mental_floss Crosswords: Rich, Mouthwatering Puzzles You Need to Unwrap Immediately!

mental_floss teams up with puzzle aficionado Matt Gaffney to bring solvers one of the most amazing crossword collections ever devised. Each of the 66 puzzles not only features a fun theme and witty clues, there's also a secret puzzle within the puzzle waiting to be solved. This is called a meta-puzzle in the biz, and Gaffney has pulled out all the stops to keep your mental wheels turning.