Nikoli Publishing Livres

Our hardest-yet Sudoku collection, handcrafted by the puzzle masters at Nikoli in Japan (whose Workman Sudoku books have 1.3 million copies in print combined).

The ultimate collection of over 1,000 handcrafted sudoku puzzles, in a range of difficulties, handcrafted by the masters at Nikoli in Japan (whose Workman sudoku books have 1.3 million copies in print combined).