It's not a textbook, but simply reading "Capitalism and Freedom" by Milton Friedman will teach all you need to know. It was published in the late 60s, so you will have to buy it used. And if you finish that, read the follow up book, "Free to Choose" by Friedman and his wife.
The guy is simply brilliant. Plus, I went to the Univ of Chicago, so I am little bias towards the Great One (Friedman).
Personally, I would avoid teaching monetarism. It appears to me that monetarism is going to the ashheap just as Keynesianism did in the early 1980s.
Teach good old classical economics. It is the wave of the future.