In order to reduce your risk profile from threats such as data leaks, unwanted system access, and system compromises you need to be proactive in implementing cyber security mechanisms. Cyber Security Principles covers the fundamentals of computer/information security and you can apply these principles to systems you want to secure from single computing devices to large network environments.
This book is meant to be a primer and introduce you to the core cyber security principles.
This book is a good reference for a user to improve their computer security. The author does not go into a lot of detail about the "how's and why's" for computer security, but gives the reader a foundation for managing their home computer system.
This is a good book for the average computer user. No breaking ground, just tried and true approaches that are considered minimum protective measures measures in the home environment.