The studies of the last few years have given us a different overview of the knowledge of what we generically call 'water'.Are you sure that you know the importance of water? You probably know that water is essential for any living organism, but do you know what kind of water is most appropriate for your wellbeing? Do you know how many kinds of water you could use and why? Do you know about the intimate structure of water? Do you know what superionic ice, a.k.a. hot ice, is? These questions and more are answered within this book.