Not a bad introduction so far, but does do that irritating thing that many "primers" do of assuming that some terms of art are so basic that everyone is born knowing them. "Modernism" is used frequently to compare other schools of thought to, but not defined until chapter 7. "Realism" is even more frequently used and never defined at all. It's a minor point: you have to draw the line somewhere with assumed prior knowledge and I can look these things up, but it does disrupt the flow of reading. It would be better if a little bit of the introduction was given over to expected prior knowledge, and/or a glossary given for terms considered too basic to cover in the main text.