From the book's Introduction:
Welcome to A Magical Society: Guide to Mapping, a free 37-page PDF that helps people make maps for plausible worlds. Taken from a macro perspective, the mapping guide goes through nine steps, each step illustrated with examples, supporting text, and a sample world map.
This free product is a collection of the three mapping sections in a larger work, A Magical Society: Ecology and Culture. Within those covers you will find help filling your world with biomes, ecological wonders, and cultural groups.