It is famously dense. It doesn’t skip the hard parts of phase diagrams or chemical kinetics.

Even decades after its release, "Best" remains a staple on the bookshelves of professional geologists. It transformed petrology from a hobby of "collecting pretty stones" into a rigorous, predictive science. If you can master the chapters in this book, you essentially understand the engine room of planet Earth.

The 2nd edition (2002) introduced significantly better illustrations and photomicrographs that helped students visualize the atomic-level changes happening inside a solid stone.

Here is the story of why this book became a legend in the world of geology: 1. The Visionary Approach

Before Best, many petrology textbooks were either purely descriptive (looking at rocks under a microscope) or purely mathematical (thermodynamics). Best realized that to truly understand a rock, you needed to bridge that gap. He wrote the book to treat rocks as that tell a story of pressure, temperature, and time. 2. The Global Scope

The second edition of is widely considered the "gold standard" for anyone trying to understand the Earth's crust and mantle.