Sudoku has taken the UK population by storm. Every daily newspaper wants a piece of the action and there are examples of these aggravatingly addictive puzzles all over the place. But are they all the same? Is one Sudoku just like any other? Of course not The majority of Sudoku out there have been casually knocked up in seconds with a simple computer programme. Original Sudoku, however, brought to you by Carlton Books in association with Puzzler Media, is a magnificent tome, full of original Sudoku puzzles from the hands of the puzzle's Japanese creators. The difference between cheap computer cloned puzzles and Carlton's Sudoku is like the difference between a monosyllabic, ten-clue crossword and a proper, intelligently sourced taxing one: cheap and cheerful versus the real deal.