It sounds like the book you're describing is tailored for beginners who want to quickly learn Git using GitHub. Git is a distributed version control system, and GitHub is a web-based platform that enhances collaboration and facilitates hosting Git repositories. Your book seems to focus on making the learning process accessible and engaging for those new to these tools.

Key features of your book, as per your description, include:

1. Quick Study Guide: Geared towards beginners, offering a fast-paced and efficient learning experience.

2. Simple and Concise Language: Uses straightforward and easy-to-understand language to explain Git concepts.

3. Examples and Codes: Includes practical examples and code snippets to illustrate concepts and guide readers through hands-on learning.

4. Screen Shots: Visual aids in the form of screen shots to enhance understanding and provide a visual reference.

5. Informative and Interesting: Aims to keep the learning process both informative and interesting for the reader.

6. In-Depth Understanding: While concise, the book strives to provide an in-depth understanding of Git and GitHub fundamentals.

7. Good Starting Point: Positioned as a good starting point for those who want to begin their journey into Git and GitHub.

For beginners looking to grasp the basics of version control and collaborative software development using Git and GitHub, it seems like your book provides a focused and accessible resource. If you have any specific questions or if there's a particular aspect you'd like to highlight, feel free to let me know!