1. Introduction
2. 1. Installation
3. 1. 1.1. Linux
   2. 1.2. macOS
   3. 1.3. Windows
4. 2. Project Setup
5. 3. Hello World!
6. 4. Widgets
7. 5. GObject Concepts
8. 1. 5.1. Memory Management
   2. 5.2. Subclassing
   3. 5.3. Generic Values
   4. 5.4. Properties
   5. 5.5. Signals
9. 6. The Main Event Loop
10. 7. Settings
11. 8. Saving Window State
12. 9. List Widgets
13. 10. Composite Templates
14. 11. Building a Simple To-Do App
15. 12. Actions
16. 13. Manipulating State of To-Do App
17. 14. CSS
18. 15. Libadwaita
19. 1. 15.1. Let To-Do App use Libadwaita
    2. 15.2. Adding Collections