Mensa Sudoku (new covers)

The Sudoku puzzles in this volume have been specially selected by experts at Mensa, the internationally renowned high-IQ society. Your objective: fill in the 9x9 grid so that each column, each row and each of the nine 3x3 blocks contain the numbers 1 to 9. The principle is elegant in it simplicity but, as you will discover, fiendishly challenging to master. Now you can enjoy the world´s most popular logical puzzle while pitting your brain cells against the world´s smartest minds.