Touch is a pretty fascinating book, delving into the importance of the sense of touch for us and what it would mean to lose that sense. It’s not just losing the sensation of your skin touching something, after all: touch receptors also play a part in interpreting pain, heat, etc. In a way, the book as a whole tells you about more than just touch, since it also gives a solid background in the nervous system and the brain.
It’s also pretty focused on stuff like orgasms and sensual touching, sometimes with fairly explicit (and somewhat unnecessary) examples, e.g. a description of a couple having sex. You may or may not find that helps your understanding; I found it intrusive to be told to imagine these things in which I have no interest! Particularly as some of these descriptions are addressed to you, the reader.
I felt that it got a bit scatterbrained at times — sometimes I felt that it wandered away from touch onto other aspects of our sensory experiences, though that’s almost to be expected. We divvy up our senses into some rather artificial boxes at times; just think of how linked scent and taste are. But mostly I found it interesting and easy to read.