Molecules is the "natural" successor to the bestseller "elements" - now it is up to the connections of the atoms shown in the "first" book. The problem is of course: There are, to say the least, to many molecules. The Gray can of course not all present in a book. Not even close. And so he did what many chemists have done before him: He has accompanied a small foray into the everyday chemistry with pictures. There are chapters on fibers (plastic, plant, animal and rock fibers), on colors, sweeteners and sugar over ... That's nice, but since this is indeed dealing here with a picture book, not too deeply (although perhaps a little higher than in the first volume). You can learn a lot of little knowledge bite and if you take to the beautiful pictures, the book has been worth it - you can just expect only no-fiction book about the chemistry. The focus is to show the pictures and the ambition of the authors, what constitutes chemistry. Both succeeded.
Less successful in my eyes the introductory chapter. I am chemically well represented and so I know the basic principles of chemistry. But I do not know if I would have understood from the explanations Grays ... But this is almost does not matter, because the other book you need in addition to the knowledge that the difference between a molecule and an atom is actually no deeper basic knowledge more.