This is just an over priced puzzle book at best. You can get much better books for your money. If you want a real puzzle book try John Emms Ultimate Puzzle book with 1001 puzzles. That is more than 4 times as many puzzles as this book has. Also it is a bigger book and easier to read etc. Like most Nunn books this one is over rated. Maybe if this was a 10 dollar book it would not be so bad. Yet for about 20 bucks its hardly worth that much. Spend your money smarter, this book just is not worth the price. Get the other book I mentioned and you will gain more for your dollar. Also with more than 4 times as many puzzles its hard to not get helped more. Not to mention Emms is a bettr player than Nunn ever was or will be.