I spent a couple of hours yesterday hanging out in Harvard Square waiting for my older son to finish a Boy Scout merit badge “camp.”  I did what I usually do when I have time on my hands, headed for the bookstore.  (In this case, the Harvard Coop.)  I had a list of books that I have been meaning to pick up and random browsing in a bookstore is one of my favorite hobbies — not an inexpensive hobby.  I […]