The book "the strangest man" goes in depth about his life and how weird that guy was. No surprise a psychologist suggested me to read it while I talked about the possibility of being autistic. Of course you can't diagnose a dead person, but let's say it wouldn't have been surprising had he discovered to be nd
I happen to be reading the book Neurotribes which is a decent (although sometimes pathologizing) treatment of autism, and it retrospectively diagnoses Dirac as on the spectrum. Silberman, the author, does reference and seems to rely heavily on the biography The Strangest Man.