I really liked reading this book, though I don't fully agree with Swaab. He states that we are formed by the development of our brain. There is a little truth in this, but I think he sees it too much in black and white. My opinion is: of course our brain does have some effect on who we are, but aren't we the ones who decide what we do and don't? And by deciding that ourselves, we expose our brain to different things. Those things have an effect on our brain, and that has consequences for how our body reacts. I don't think that there's no free will.