Having read a couple of reviews and articles about Andrew Solomon's book Far from the Tree, I ordered it from the library and am finding it fascinating and absorbing, although it's so dense, long and heavy that I'm having to go to and from work by bus (slower and fewer changes than other routes) to give myself some chunks of reading time. Here's a link to a Guardian review.
I'm particularly interested in his observations on parallels between different conditions, and on how having a disability or life experience that makes us "other" often makes us more tolerant of other people's differences.