Amvik eBook Solutions

Can't get enough of Sudoku? This book is for you! It contains three hundred challenging and devilishly difficult Sudoku puzzles in a portable paperback. Feature

If you're an experienced sudoku puzzle solver looking for a real challenge, then the World's Hardest Sudoku Book: 200 of the World's Toughest Sudoku Puzzles (Vo

The first in a new series: hard puzzles for serious sudoku solvers. Do you have what it takes? These 200 challenging sudoku puzzles from Will Shortz will keep y

Also the puzzle may contain the regions of random (irregular) shape; this variant is called Jigsaw Sudoku

'Explained SUDOKU' by Dr. George Ho: a book containing 30 hard or very hard SUDOKU puzzles with solutions fully explained, solved by a Uniform Method with many