"A modern, smart puzzle book, unlike anything I've seen before, whose math and logic challenges will stretch your brain in new ways."--Will Shortz, New York Times crossword editor and NPR puzzlemaster
Read More
"A modern, smart puzzle book, unlike anything I've seen before, whose math and logic challenges will stretch your brain in new ways."--Will Shortz, New York Times crossword editor and NPR puzzlemaster
Read Less