Dive into the intricate world of Capture the Flag (CTF) challenges with this comprehensive guide that goes beyond basic security testing. Written with both humour and expertise, this book transforms you from a challenge-taker to a masterful challenge-creator. Drawing from real-world experience across four countries and countless security scenarios, the authors share invaluable insights into crafting engaging, educational, and meaningful CTF challenges. You'll learn how to design scenarios that teach while they test, create compelling narratives that enhance the learning experience, and build challenges that contribute to the growth of the security community. From scoring systems to story-building, from Microsoft environments to custom scenarios, this guide covers everything you need to know about creating professional-grade security challenges. Whether you're a seasoned penetration tester or just starting your journey in cybersecurity, this book provides the tools, techniques, and inspiration to elevate your CTF game to the next level.