One of the reasons that the author finds hydrates so interesting is their unusual properties. Since the time of the first edition several new properties have come to light and are discussed in the second edition. These include the type o hydrate formed from mixtures of methane and ethane, hydrates of hydrogen, the role of isopropanol in hydrate formation, etc. All of these topics will be discussed.

Another addition to the book is discussion of a few other hydrate formers. Notably, the hydrates of ethylene and propylene are included.

More examples are taken from the literature and additional comparisons are made. A new section on the prediction of hydrate formation in sour gas is also included.