Ihave always been fascinated with the amazing careeer of Charles XII of Sweden and was pleased to see this book back in print. It is a touch dated now. I took it with me to the battlefield in Ukraine and found it as a guide reasonably useful if lacking in some detail.
However it is not a tour guide. As a good straightforward introduction to the battle of Poltava and its preceding campaign it is really very good. If you want a flavour of this little known (outside of Sweden) invader of Russia who met the same fate for similar reasons as his French and German successors read this book. For a more extended discussion see Peter Englunds 'Battle that shook Europe'.