The story of a man who couldn't read

Jacques Demers, a famed figure in hockey and in Quebec, recently revealed he cannot read. Actually, he co-authored a book about it. Reading of his achievements, and his ability to apparently conceal his disability, I wonder if he has some specific neurologic cause of his reading inability - beyond his limited educaton and traumatic childhood. It would be interesting to know of his children have had problems. The NYT article is well written and tells a remarkable tale.