Step into the world of white-hat hackers who use their skills for good, protecting computers, uncovering vulnerabilities, and preventing cyberattacks. Middle-grade readers will learn about the techniques and tools these digital defenders use, including coding, penetration testing, and ethical hacking frameworks. Technology and STEM enthusiasts will be fascinated by this insightful look at the heroes of the cyber world and their mission to keep our digital spaces safe.The highly accessible layout captures middle school STEM content at a 4th-grade reading level. Includes a table of contents, stat boxes, captions, a glossary, index, and extra book and website resources.