This book is billed as philosophy but it's just Churchland reporting the results of neuroscientists. It reads like an opinionated blog post by a vanilla atheist, with frequent personal digressions, overlaid onto pop-sci brain factoids, with an implicit but not developed claim that everything humans do is brain-based. It's neither personal enough to be touching, nor rigorous enough to be convincing, nor deep enough to even qualify as anything but reporting on a sports team (brain scientists practicing methodological naturalism) and saying they'll probably win the big championship of explaining life, the universe, and everything. The thing is, she's not a player, just a reporter. She has nothing to add to the discussion but moral support for those practicing perfectly vanilla brain science. She points out the naturalist approach has done well so far, gives some simplified instances of their work, and assures us they'll probably go all the way. I don't call this neuroscience OR philosophy, let alone "neurophilosophy". She's just a reporter on neuroscience at best, and more a denier of philosophy than a practitioner.
The basic pattern of each chapter is "What is (main topic of human interest, such as sexuality or aggression) really? Here are some ways brain damage can disturb functioning in this area. Here is far more tedious technical information about peptide chains etc than you require in order for me to make my point that 'the brain is closely involved'. Still, it's all very complicated and we don't know exactly what causes what, doubtless making you wonder why I belaboured it so much. Anyway, surely the proper course of action is the middle way, namely thinking exactly like me and being an eliminative materialist, even though that's a minority position even among materialists." The only opponents she addresses in the book are people like those who claim to be helping profoundly autistic children to communicate with their parents by pressing their fingers down on keyboards to say things like "I love you mommy". To put it mildly, this is not honestly addressing the strongest criticisms of eliminative materialism. The book has the intellectual depth of a high school biology textbook.
Specific gripes: She admits, on page 56, to have nothing to say about the hard problem. Presumably if this were put on the book jacket, sales would have plummeted. She does go on for pages about how we'll probably explain it though, sounding to me very much like a medieval Catholic saying theologians would probably eventually explain why bad things happen to good people, not seeing that "explain it" and "explain it under my belief system" are two very different things. The hard problem is only hard under materialism. Look at the world as Bernardo Kastrup or Donald Hoffman do, and it evaporates.
The theory of illusionism has been criticized for absurdity, but, reading this book, I almost longed for something with its ambition and scope, chutzpah and daring. I don't think Churchland even has a grasp of what consciousness is, in the "why are the lights on" sense, beyond having access to information, in the same way a computer might.
She mocks Chalmers for declaring consciousness mysterious without doing experiments, giving me the impression she has "scientist envy", not willing to honour the value of thinking in itself. Chalmers' framing of the "hard problem" helped many clarify their thought -- Churchland barely has thought worthy of the name, at least that I could find in this book, beyond "Meh, it's probably all physical. Look at all the stuff that has been so far."
She says that the body is paralyzed during sleep, hence the common nightmare where you can't run or yell. So how to explain our normal ability to walk and talk in dreams? She also mentions, in the context of addressing NDEs, about how she feels subjectively like she's floating after yoga, but knows her body isn't moving. Does she think dreams and NDEs involve physical bodies moving around in 3d space? I don't know how else to interpret these two odd passages. Can she even mentally accomodate the proposition that something might exist, or at least be perceptible, but not be physical?
She says most people probably don't believe in the free will denied by thinkers like Sam Harris (though she doesn't mention him by name), but bases this on her random convos with random people. Most Americans believe in God. Her definition of free will, as something like self control afaict, seems to be applicable to cybernetic systems to me. Does she think most of these theistic Americans think computers have free will? Is coming to a half-hearted conclusion based on random convos really worthy of a professional career?
Churchland says something like "There's no evidence of people being aware of things without paying attention" (paraphrase, I forget the exact wording), but never mentions blindsight, though this book came out in 2013.
This book is nothing, just another shallow popsci summary of other people's work masquerading as philosophy. Read Metzinger instead.