**Derrick Niederman *is the author of Number Freak: From 1 to 200--The Hidden Language of Numbers Revealed *, along with several volumes of minimysteries and math puzzle books. He is also the creator of more than 20 crosswords for the Sunday New York Times, and the designer of the mathematical puzzl...

**Derrick Niederman *is the author of Number Freak: From 1 to 200--The Hidden Language of Numbers Revealed *, along with several volumes of minimysteries and math puzzle books. He is also the creator of more than 20 crosswords for the Sunday New York Times, and the designer of the mathematical puzzle 36 Cube. He lives in Charleston, South Carolina.