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New Release

Nine Lessons I Never Learnt in School

The Unwritten Curriculum Classrooms Didn't Teach Me

A definitive guide to practical cybersecurity skills that traditional education doesn't teach - woven together with my personal story and journey into the world of Cybersecurity and EthicalHacking.

Through real-world information security techniques, hard-earned lessons, and industry-tested insights, I share what it truly takes to grow, think, and succeed beyond the classroom.

₦15,000 (Limited Time Pre-order Price)

"The most practical cybersecurity guide you'll ever read. Coy Emerald shares secrets you won't find in any textbook."

Nine Lessons I Never Learnt in School Book Cover

What's Inside

Practical Foundations

Develop the cybersecurity and ethical hacking mindset and skills you need through my experiences and the roadmaps I followed, even without a formal degree.

Bug Bounty Hunting

Step-by-step guidance on how to get started with bug bounty hunting. Learn the exact methodology I used and how I became the first Nigerian security researcher recognized by Apple.

Cybersecurity Hygiene and Internet Shortcut Keys

Learn essential practices to stay safe online from cyberattacks like phishing and business email compromise (BEC), while boosting your efficiency.


Master internet shortcut keys to navigate faster and work smarter.

Career Development

Build a successful career in cybersecurity and ethical hacking, with or without a formal degree. Explore freelance opportunities and grow your expertise in the field.

About The Author

Coy Emerald

Coy Emerald (Oyetunde Yunus)

Founder of O-range Cyber Security Training & Services Ltd. With years of experience in cybersecurity, Coy Emerald has been recognized by major tech companies including Apple and Microsoft for identifying critical security vulnerabilities.

His practical approach to ethical hacking has helped hundreds of students launch successful careers in cybersecurity. Through his training programs and now this book, he continues to democratize access to practical security knowledge.


"I wrote this book to share the knowledge I wish I had when starting my cybersecurity journey. "Nine Lessons I Never Learnt in School" contains the practical skills that make the difference between theory and real-world success."

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Account Name: Oyetunde Yunus Damilare
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Amount: ₦15,000

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