Firewalls Don’t Stop Dragons: A Step-by-Step Guide to Computer Security and Privacy for Non-Techies, 5th Edition

Good digital security is less about building an impenetrable fortress than taking sensible steps against the risks people actually encounter. Carey Parker’s Firewalls Don’t Stop Dragons explains those steps in approachable language, with a castle-defense metaphor that makes layered computer security easier to picture—and practical advice readers can put to work.

This fifth edition is a hands-on guide to computer security and privacy for non-specialists. Its chapters pair clear explanations with more than 200 tips, checklists, step-by-step instructions, and screenshots, so readers can follow the actions and understand the reasoning behind them.

Make everyday security easier to understand

The book starts with foundational ideas about computers, networks, privacy, and common security threats. From there, it turns to practical protections: backing up devices, installing updates, choosing and managing passwords, enabling two-factor authentication, and tightening computer and account security.

Protect more than just your computer

Parker also covers safer browsing, online tracking, secure communications, home networks, and smart devices. The broad scope helps readers see how choices around accounts, phones, websites, and connected devices fit together in a more private and secure digital life.

Clear steps, with the reasons behind them

Checklists make it easier to identify recommended actions, while the accompanying explanations provide context without assuming a technical background. Readers can work through the guidance at their own pace and return to individual tips when a particular security question comes up.

For curious, practical-minded readers

Written for everyday computer and smartphone users, this guide may also be useful to anyone who often helps friends or family with technology. The fifth edition was updated for Windows 11, macOS 13, iOS 16, and Android 13, and offers a structured introduction to the habits and concepts behind personal cybersecurity and digital privacy.