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Review title: Very poor on twins and triplets
Product review: This A6 size book(HtoSS} while OK on basic scanning techniques ,is very deficient on twins and triplets,but these are what you need to solve the difficult puzzles in mags, books, and papers. You need to know the how, when, and where of these and all variations.This book only has one instructional diagram on them, seeming to just mention them in passing. The only easy to understand guide that covers them properly is 'So Do Sudoku' (SDS) which has ten instructional diagrams on them.Also the intermediate technique in HtoSS is covered easier and better by an alternative scanning technique in SDS. All these books have been said to be useless by people who assume everyone else is up to their level, when in fact these books are written for the majority of people who struggle with the puzzles in general circulation, and contain tips to help you complete them. None of them are useless to the right people ,but some are better than others.
