Anyway, about halfway through the day, it occurred to me that I could take the edge off the request -- make it less pushy -- if I mentioned that there was a "free sample" at Amazon that they could read, and if they liked it, then they could by the book.
I've printed up enough of the postcards that I'm going to instruct Matt and Cameron to give them to everyone who comes in the door -- but they are to do it very softly. No hard sell. Mention the "free sample."
It probably is about as effective as "cold calls" -- maybe more, because it is a personal approach -- but I'm not concerned. If one in 50 check out the book, so be it.
I'm taking the attitude that every little bit helps.