2 of 2 people found the following review helpful
Practise makes perfect,
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This review is from: The Times: Fiendish Su Doku Book 2: Bk. 2 (Sudoku Syndication) (Paperback)
Great Book and swift delivery.
After several yaers of practice I am up to this level now and striking over 80 percent.
I get a real workout solving these.