SO AS A RESULT OF THE JOHN BIRMINGHAM BOOK MENTIONED BELOW, I got an Amazon recommendation for a rather different book, How to Become an Alpha Male.

Er, aren’t all bloggers Alphas, by definition? I can’t say much about the book, but from looking at the reader reviews I learned that there’s such a thing as “the seduction community,” described in an entirely un-ironic and unself-conscious sense (more on that here) and that there’s good advice to be had on body language:

such as not be hunched over with your eyes cast downward

It’s hard to argue with that! Another book I wouldn’t have noticed, and another “community” I would have missed, if it weren’t for the magic of collaborative filtering — and its occasional misfires.