Gift a puzzle book stocking filler this Christmas The fourth instalment in the fiercely popular, bestselling Fiendish Su Doku series. A new collection of previously unpublished Fiendish Su Doku puzzles with the added bonus of 25 Super Fiendish puzzles. Perfect for the advanced solver in need of a constant supply of ultra-difficult puzzles, and guaranteed to provide hours of absorbing, brain-stretching entertainment. The puzzles in this...
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