This is the best collection of traditional and
celtic arrangements for hammered dulcimer I
have seen anywhere! Fantastic!

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This book is good! Problems from IMO are really amongst the best in the world, so what else do you expect? It really took many years and brains for these problems to come into existence indeed, though we all know that some problems are just important results or just special cases of some research problems relatively unknown to people not in the mathematical field. The book provides some multiple solutions and methods where possible, though it is not possible to include all possible solutions. Not even the greatest mathematician can say that there are only finitely many ways to approach a problem. So you may well on your way to discovering more solutions, even more elegant ones, who know? Enough blabbering.
The book only contains problems and solutions from 1959-1999, and only that. No other information can be gleaned from this book essentially. Matters which have raised curiosity like the proposers of each problem, the venues of the competition as well as the dates are not found in the book.
One last comment, the book was originally a Hungarian book, and it took three translators of Hungarian descent to translate the book. The language used is not perfect, and has a Hungarian taste, but it will not impede your reading. So I took one star off. I hope this is not too drastic.
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