James D. Hill, a.k.a Professor Hill, is a retired educator who taught math, physics, biology, chemistry, and science at the high school level. He has a degree in biology and chemistry from the University of Kentucky and a Master's from Eastern Kentucky University. He has lectured to classes at the University of Louisville. He lives in Louisville, Kentucky.
Professor Hill Presents the World's Greatest Number Puzzles!
For Sudoku addicts, a whole new world of number...