I don't know how proper this is, but I'm quite cheap and like a bargain, and I've seen Lehrer referred to a number of times here. I hadn't read Kahneman before, but bought the kindle version and read him on my phone whenever I had some wait time somewhere.
It's better than a mokeskin pouch! I can have the top *thousand* books I'm reading on me at all times, and just pull one out anywhere! I never have to waste another minute of my life!
I don't like spam anymore than anyone else, but I'm going to be getting it cheap, and I just want everyone else who wants it to get it cheap too. It's okay to spam people about cheap books, right? That's a family tradition.