Sinister Sudoku: More Than 1,000 Fiendishly Tough Puzzles

Can You Master These Challenging Sudoku Puzzles? The perfect book for veterans of these popular conundrums, Sinister Sudoku will provide a sly, absorbing test for even the best, most proficient experts. It starts with advanced puzzles that are more difficult than might be expected before moving on to sudoku that could crush even the most stalwart of solvers. You'll go crazy for these super-engaging brain bafflers!