Definitely worth a read, surprisingly readable and thought provoking for a science book on such a well known topic. It reminded me of "Why We Sleep", it will make you move more, even if it's just walking.
In short, it's in our nature to avoid moving, but it is massively important that we do it anyway for our overall health (mental, cardiovascular, etc.). Make sure to make exercise easily accessible to you, fun and frequent. He recommends to do mostly cardio, but also some strength training/weights.