Well, let's just say Mr. Kean clearly isn't Helen Czerski (and that is not a good thing).
He either has no clear conception of who his target audience is, or he doesn't know how to talk to his audience. Someone with an average to advanced training in science obviously wouldn't need any explanations as to the structure of the periodic table, to begin with. The rest of us might need one -- but (and it speaks volumes that I even have to emphasize this) a clearly structured one, please, not an assortment of anectdotes that blows any explanatory structure clean out of the window. Also, if you're writing a book subtitled (in part) "...Tales of ... the History of the World from the Periodic Table of the Elements", wouldn't it be a good idea to give your readers an idea when and how the periodic table itself made its first appearance in the history of the world? Just a paragraph or so, for reference in conjunction with its basic structure, so we know where we are, both in chemical terms and the history of science? (Ms. Czerski did just that. But as I said ... Mr. Kean clearly isn't Helen Czerski.)
So far, he's managed the feat that only one of my school teachers ever managed, and that was my physics teacher, who, like Sam Kean, presented his material full of enthusiasm as to the magic of it all, or the big joke associated with a given scientific fact / discovery, or some other reaction clearly warranted in his eyes, while completely failing to transport to the rest of us -- and hence, leaving us entirely mystified -- what all all of this had to do with any of us and why it was actually important (other than in a way that only the initiated would be able to appreciate). I used to actually like chemistry in school (unlike physics), and I believed I had a fairly good grip on the subject -- an impression my teachers seemed to share, judging by my grades. A major reason for this was the fact that (unlike in physics class) I never had a moment's doubt as to why what I was learning mattered, and how it all fitted together in the grand scheme of things. But if I didn't at least have this distant reservoir to rely on, I'm pretty sure I'd be entirely baffled already. And I can only hope that this state of affairs is going to improve, because otherwise I'm either going to throw in the towel or it's going to take me eons to finish this book (and it won't earn a particularly high rating, either).