A fun collection of bizarre medical (and mostly psychological) experiences Sacks had while practicing medicine. While few of these tails were of actual benefit to me, it was interesting to see how power the mind can be.
Interesting tidbit: Sacks' tale for which the book is named after is one where the man, a brilliant music instructor, can no longer identify patterns but only disconnected attributes (i.e. he can see the nose, eyes and mouth but no longer recognizes an face). He is still able to correctly identify his students by their body movements or "body music" as he calls it.