Brattle Book Shop in Boston is my favorite kind of bookshop.  It isn’t a chain.  You won’t find all the latest releases.  There isn’t a coffee shop or a play area for your children. It isn’t full of comfy chairs and carefully curated displays. What it is is a real honest-to-goodness secondhand bookshop and there aren’t too many of those around these days.  Nothing says happiness like rummaging through an eclectic selection of old books and discovering a treasure you didn’t even know you were looking for. I only had half an hour before I had to be at an appointment but it was a half-hour I put to good…