I haven't read the first, but The Good Earth is one of the best books I've ever read.
There's some frugality in there, but I wouldn't think of it as Mustachian.
Man it's good though. Course a lot of that may be nostalgia that I have for all books I read between grades 4 and 7. Flowers for Algernon is a one I feel the same way about that I'm rereading right now. Some don't hold up upon rereading, such as The Grapes of Wrath, but I did reread The Good Earth in my early 20s and still enjoyed it.
I will add the first one to my list based on the fact that it was shortlisted with The Good Earth.