There isn't a standard "first part" to a geography book. It depends on the specific book and how it's structured. Here are some common ways geography books are organized:

* By Region: Many geography textbooks start with a section about the world as a whole, then move onto regions like continents or countries.

* By Theme: Some books focus on specific geographical themes like physical geography (landforms, climate, etc.), human geography (population, culture, etc.), or environmental geography.

* By Skill: Others start with basic geographical skills, like map reading or using GIS, and then move on to specific topics.

So, the "first part" could be:

* Introduction to Geography: A general overview of the field, its history, methods, and importance.

* World Geography: An overview of the continents, major features, and global patterns.

* Physical Geography: Explanations of the Earth's physical systems like the atmosphere, oceans, and landforms.

* Human Geography: An exploration of human populations, cultures, and societies.

To answer your question accurately, I need to know the specific geography book you're asking about.