At the moment I'm reading a book which the library book club chose, and which I heartily recommend. It's called Born on a Blue Day a Memoir by Daniel Tammet. The subtitle is "Inside the extraordinary Mind of an Austistic Savant."
This is a brilliant, well-written book by a real life "Rainman"-- a young man who tells his story to help others with conditions such as epilepsy or Asperger's syndrome to recognize that the nature of one's brain need not always interfere with one's overall development of one's potential. The NY Times review of it said, "Something in the way that Mr. Tammet describes the beautiful, aching, hallucinatory process of arriving at his answers illuminates the excitement of all cogitation."
Daniel brings his world vividly to life--but it was for me, something like being transported into a wonderful, but very strange world--a world where I don't belong and where I can only grasp slowly at what comes automatically for him. For him, numbers have shapes and colors and they are an all consuming interest. There is a world going on around him in which he learns to navigate with some difficulty--always the outsider--not so much looking in at others as unable to relate to them in the way he observes them relate to each other. That condition he accepts and brings us to understand.
As he says in the first paragraph, "I can recognize every prime up to 9,973 by their 'pebble-like' quality. It's just the way my brain works." For Daniel--January 31, 1979 is a Wednesday, because Wednesdays are always blue and the date is blue in his mind. For Daniel that date is a Blue Day.