It gave me a really good explanation of why costs aren't totally passed onto consumers, and what conditions affect how much cost is passed on. Also, apparently the book says something about communism.
When I asked if monopolies produced more or less goods than competitive markets, it got the effect of economy of scale exactly inverted, and finished with the usual textbook answer that monopolies produce less and thus created less value.
That's what I was afraid it might do with a somewhat technical subject like this, get two words reversed and change the whole meaning.