6. The Man Who Mistook His Wife for a Hat, by Oliver Sacks. I've been wanting to read this one for a while, and it did not disappoint. Sacks had a wonderful, warm narrative style as he tells the fascinating stories of his various patients. Some of the more fascinating include the gentleman depicted in the title. He really did, right before Sacks, mistake his wife's head for a hat. He had a curious and (seemingly progressive) neurological disorder that did a couple of things. One, he "blanked out" anything on his left side, and two, he could not identify faces (unless they had a striking feature) or even common items. For example, Sacks gave this man a glove and asked him what it was and what it was used for. The gentleman made many observations about the glove but could not name what it was or what it was used for. Another story that stands out is about identical twins who were severely mentally challenged - they could not actually do even rudimentary math. But they could "see" numbers, come up with prime numbers at 6, 7, 8 numerals and even beyond. There's also a story about two women who suddenly could hear music. This went beyond mere earworm and was so loud at times they could not hear someone talking to them. A small stroke was responsible for one case; I don't recall what the issue was with the other, but it, too cleared up. The stories here (and in his other book Musicophilia) bring to light just how much can go wrong with the human brain, and in so many bizarre ways. Really, it's a miracle things go right as often as they do, with everything that could go awry.
Currently reading: Helter Skelter, by by Vincent Bugliosi and Curt Gentry.