All in good time. That was the first of 3 or 4 interviews I did with him as part of research for my book on the history of the PLATO system, which Alan and a number of PARC folks were keenly aware of and went out and visited (and PLATO folks came out to visit PARC).
I went back and checked the transcript of the interview. He told me he reads "somewhere between 200 and 400 books a year, since I was five or so. Depends on the year. And generally a wide range of genres and things. . . most of the sciences."