If you're a gardener with a scientific bent, or a fan of science with a botanic bent, this is a great book.
Chamovitz breaks down the current science of botany and makes it interesting and comprehensible to the average armchair enthusiast by using our own senses as a basis for what a plant...knows. Do plants 'see'? Do plants 'feel'? So plants have a sense of 'smell'? The answers might surprise a few people. The author is very clear that these comparisons are very loose and plants are not, of course, thinking or sentient. But as a starting point for understanding how plants do thrive and survive, our senses make for an excellent starting point.
This is a fast read; I was able to complete it in one day, and there was nothing dense about the writing or the research. Chamovitz provides suggestions for links in the footnotes, a very thorough Notes section and an excellent index. There wasn't a wealth of practical knowledge (although I do now know how to force short-day plants to bloom at will), but all of it was interesting and I learned a lot.
Highly recommended for the greenies. ;-)