Sudoku Puzzle Secrets

Here are few paragraphs from the book,

It seems that these days everyone is enjoying the game of Sudoko wherever they are. The Sudoku puzzle is ideal for whenever you have a few spare minutes and want to indulge in a little bit of thinking power. Sudoku, sometimes spelled “Su Doku”, is a puzzle that originated in Japan. The puzzle is known as a “placement” puzzle. In the United States Sudoku is sometimes called the “Number Place” puzzle.

People of all ages and from all backgrounds are finding...