A fascinating book about the neuroscience of dreaming, including lucid dreaming and hallucinations. The first part was really interesting, especially how Hobson explains the AIM model. The middle part gets pretty technical and harder to read as he keeps reiterating the functioning of certain parts of the brain but in depth. The final part is a bit lighter and connects with other phenomena, psychotherapy and other altered state issues.
I did enjoy it, but this is not for the neophytes. Also, it's important to take it as highly speculative (and old in terms of the neuroscience field) as we still can't map or understand many of Hobson's intuitions. I personally feel it tried to cover too much and some parts became very repetitive without providing new insights beyond a bit more description (also he had a big beef with Freudians haha). All this said, it was a highly informative book and worth reading if you have a basic neuroscientific foundation or interested in how the dream machinery work. If anything, I wished he had touched a bit more on things like meditation, trance, mantra singing, etc. He does mention it but very slightly, trying to avoid hurting people's beliefs as he clearly has a very different personal opinion. I wished though, he had gone a bit deeper in those parts.