I know you have discussed these in the past, but if you have any caveats or suggestions, that would be interesting.

The principle of the thing is enticing, but I don't want to get e.g. the early civilizations one and end up shouting at the iPod "What about X? Huh? Huh?"---or any other subject I've read recent work in.

"Ethics" is interesting but possibly too limited (Aristotle only, hm).

Maybe the "how to argue" one would be a good place to start...