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I like Mark's work, so I persisted to the end, but the narrative, focused on his supposed fears and foibles on a long flight were an irritating distraction from what should have been an interesting subject. He has gone down a bit in my estimation as a result, I'm afraid.
Miodownik after his successful book on solids (Stuff) wrote this on liquids. But it's not very deep (I would have liked more on non Newtonian liquids for example) and he goes off on tangents, notably on global warming and plate tectonics. Maybe there's not that much to say about liquids ? His gambit of using a London to San Francisco flight for his agenda is way overdone. He closes with a final irony (not noticed); he and his neighbor on the plane were both going to the same sustainable development conference in San Francisco. For two people (among many others) to fly 12 hours each way on an airplane for a one or two day conference doesn't seem very sustainable to me.
The author is very knowledgeable and passionate about his subject. However, the conceit of a plane journey to tie chapters together felt trite and forced. It's possible that some of the science was distorted and/or some facts of interest left out in order to fit the science into the journey.