The book mentioned by Oliver Sacks on hallucinations looks interesting.

I have to say that one of my favourite neuroscience books has to be, "The Man who Mistook his Wife for a Hat" by the aforementioned Dr. Oliver Sacks.

http://www.amazon.co.uk/Man-Who-Mistook-His-Wife/dp/03305236...

It's really a great read for anyone interested in neuroscience, psychology or just weird and wonderful stories in general.