Enjoyable, as Sacks always is, but more episodic than some, with modular chapters that don't really build on each other. Sacks here identifies and characterizes a variety of processes, ailments, damage, and poisons that can lead to different forms of hallucination (with a delusion or two thrown in f...
More clinical than later books, so dense, but full of wonders.
Some interesting stuff, and I loved the migraine art, but so far, not much I didn't already know.