![Sudoku Mental Floss Puzzles](http://puzzlemethis.com/cdn/shop/products/EvoShopify_STR789397_{width}x.png?v=1636574415)
Sudoku super-master Frank Longo and mental_floss, the magazine for trivia lovers, bring fans a collection of superb puzzles sure to stimulate the brain. Longo's puzzles are always top-notch, and because these increase in difficulty as the book goes along, they're perfect for helping solvers build their skills.