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The Times Big Book of Ultimate Killer Su Doku
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Challenge yourself at home with number puzzles If you like to live dangerously and push beyond your mental comfort zone, steel yourself for The Times' toughest Ultimate Killer puzzles. A bumper collection of more than 360 puzzles for hard-core solvers. Selected from the pages of The Times these puzzles will challenge the sharpest minds.
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2021, paperbackBook purchase
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