Oliver Sacks is a noted neurologist, and has published some interesting books in the past. One became the basis for the movie "Awakenings" with Robin Williams and Robert DeNiro, and another I have read was "The Man Who Mistook his Wife for a Hat" which is a collection of interesting case studies of various pathologies. I recently became aware that he also has a couple books dealing with the sense of hearing.
"Seeing Voices" dives into quite a bit of Deaf history and lends plenty of credence to ASL as a whole language. It's been a few months since I read this book, but basically he became very interested in the Deaf at some point in his life and decided to learn more and try to tackle some important issues at hand. Also describes a phenomenon likely familiar to many late-deaf people known as "phantasmic voices". An example of this is "hearing" a voice while watching someone speak, even though the voice is not really audible. Overall, it is light reading, but extremely informative for anyone interested an Deaf history and culture.
"Musicophilia" deals with the relationship between music and the human mind. Takes a case study approach and can be quite hilarious at times (how many jingles have you ever had on repeat at 3am?). A really interesting read.