Be Mine Sudoku / 200 Sweet to Sinister Puzzles - Shortz, Will (New York : St. Martin's Griffin, 2016)
Will Shortz has been the crossword puzzle editor of The New York Times since 1993. He is also the puzzlemaster on NPR's Weekend Edition Sunday and is founder and director of the annual American Crossword Puzzle Tournament. He has edited countless books of crossword puzzles, Sudoku, KenKen, and all manner of brain-busters.
Keywords: Mathematical recreations