First things first – this book has nothing to do with Einstein, for which I ought to dock it several stars for gratuitous use of the great man’s name, but I can’t because it’s such a good book. And it’s about the chemistry of food. The format is simple. Robert Wolke gives us a series of questions about food that have a chemistry-based answer and… he answers them. Interspersed there are a fair number of recipes, vaguely relevant to the question. And that’s about it. But it’s the way he tells them. Firstly, Wolke is genuinely funny. I would advise any science writer not to use humour, because on the whole it just doesn’t work. The writer comes across as smug and/or silly. But for some reason, Wolke’s funnies (painful though some of them are) hit the spot for me. Take this from the opening: What are the first two things a server says to you as soon as you’ve been seated in a restaurant? (1) “Hello, my name is Bruce/Aimee and I’ll be your server.” (2) “May I bring you something to...