My main problem with the book is its diffuseness. It covers all ages, all history, all literature, eastern and western philosophers, and so much more. Of course every sentence isn't untrue: there are lots of insights and quotations that are thought-provoking and worth looking at, and some quite nice historical summaries. But on the whole, I think it's a dubious book.
It did remind me that the five senses are the subject of the fabulous unicorn tapestries in the Cluny Museum in Paris, for which I'm grateful, and I'll have to work on that subject soon.
The Lady and the Unicorn, Sense of Smell (WikiMedia)