Stigler's book was an advanced economics textbook originally intended for graduate students.
Over time, it evolved and became The Theory of Price, expanding its scope and becoming a standard text at the undergraduate level.
Stigler's work transitioned from the influence of Alfred Marshall and the inter-war School of economics to the post-WWII Chicago School, showing a shift towards greater analytical rigor and the use of mathematics.
[1][2] According to Ronald Coase, while it's a challenging yet valuable resource for aspiring economists, the textbook isn't where Stigler’s most innovative economic contributions are found, which explains why it wasn't a focus when he received the Nobel Prize.
Although engaging and witty, the book covers conventional topics expected in price theory, not groundbreaking work.