The books contains 200 Asterisk Sudoku puzzles 9x9 at the level of Very Hard. 2 puzzles per page. All riddles have only 1 solution. Perfect for Advanced players.The font size is correct, you will not have to strain your eyes when solving puzzles.High quality paper and print (all puzzles read well, easy to write with pen and pencil without worry of bleed-through). In Asterisk Sudoku there is an additional area, shown on the grid by shading nine specially selected cells. Those nine cells must also contain 1 to 9.