Personally, I enjoied a lot this book. Eccentric, funny, interesting with an "hands on" tone it intoduces to a good variety of sensors.
I would say that this book could be addressed both to beginners who can be introduced to the subjects in an "easy" not conventional way, and to the practitioners that can find in it useful suggestions immediately directed to the heart of the problem.
The subjects are explained in an "high level" way without entering in theoretical dissertation, you can find in it a brief explanation on how the sensor works and some schematics for managing the signal out from the sensor itself.
I repeat, not a conventional book. You have to be aware of this if you are planning tu buy it but, to me, it deserves your attention and it is , definitely, a good book.