Due to an Amazon back-to-school special today I was able to pick up the ebook textbook Variation in Working Memory for a fraction of regular price. This is not the standard kindle price you may see when you search with a computer. I only got it via a kindle app on my tablet. Problems with working memory are one of the worst aspects of my impairment, and stopped me from holding a job. Now doctors can blame this on age, but it started when I was in my early 20s. I have been frustrated that no doctor seemed much concerned when I reported enormous reduction in my ability to remember things while working. At one time I had demonstrated a "digit span" that one psychologist said was impossible (36 digits). He felt I was cheating, but never figured out how. Naturally, when this "impossible" ability went away nobody was concerned. I believe this is a real aspect of "brain fog" which varies in response to exercise and other factors, and it has bothered me that no one wanted to investigate this measurable impairment.