What if AI could help you think clearly, not just work faster?
You have tried ChatGPT. Got a generic email back. Wondered what the fuss was about. This book is not about AI tools. It is about using AI to get the ideas out of your head, structured, and acted on, so you can think clearly for the first time in years.
Coming May 4, 2026
Get the Book“Thinking Outside Your Brain with AI” is a book by Roy Castleman (2026, ISBN 978-1-0676727-0-6) that teaches non-technical business owners how to use AI as a cognitive partner rather than a productivity tool. It introduces the 60/40 Principle (60% human thinking, 40% AI support) and the EVOLVE framework for human-AI collaboration. The book draws on Roy's experience building seven-figure IT businesses over 28 years and his personal transformation from 90-hour weeks to a five-hour working week.
Everyone is talking about AI. Nobody is talking about thinking.
A Wharton study found that 73% of business professionals using AI showed measurable cognitive decline. Not because AI is bad. Because they were using it wrong. Outsourcing their thinking instead of upgrading it.
That is what is happening right now. Business owners are either ignoring AI entirely or surrendering their judgement to it. Both responses make the problem worse.
Your brain is already full. You carry every decision, every client problem, every operational headache. AI was supposed to help. Instead it added another layer of noise. Another tool. Another thing to figure out.
This book is the reset. It shows you how to use AI to think more clearly, not think less.
What you will find inside
The 60/40 Principle
60% human thinking, 40% AI support. Not the other way round. You stay in charge of the ideas, the judgement, and the decisions. AI handles the processing, the organisation, and the first drafts. This is how you use AI without losing yourself in it.
The EVOLVE Framework
A practical framework for human-AI collaboration that works for business owners who are not technical. No prompt engineering. No jargon. Just a clear method for getting your thinking out of your head, structured, and acted on.
Real stories from the field
Not theory. Real examples from Roy's businesses and coaching practice. How AI turned a two-and-a-half-day podcast production into fifteen minutes. How it helped an owner see a pattern in their business they had missed for years.
The moment it clicks
Laura's school play. The evening Roy was actually present for his daughter's performance instead of mentally rewriting tomorrow's operations list. The moment he realised the method was working. That is what this book is really about.
About the author
Roy Castleman runs four businesses, three on five hours a week. He built multiple seven-figure IT service companies across thirty countries over 28 years, then used AI to do in six months what previously took seven years.
This book comes from that transformation. Roy did not learn AI from a course. He built an AI-powered operating system that runs his coaching practice, automated his podcast from two and a half days to fifteen minutes, and developed the EVOLVE method from thousands of hours of real-world use.
He is the UK's first certified BOS UP coach, a certified Wim Hof Method instructor (Level 2), and has completed over 2,500 skydives. He lives in Bedfordshire with his family.
4 businesses. 5 hours/week. BOS UP certified. Wim Hof Level 2. Author.
Read Roy's full story →Book details
Questions about the book
What is Thinking Outside Your Brain about?+
Is this a tech book?+
Do I need to know about AI before reading it?+
How does the book relate to T.H.R.I.V.E.?+
When does the book come out?+
Start thinking outside your brain
The book that changes how business owners think about AI, time, and freedom. Available May 4, 2026.
Get the BookISBN 978-1-0676727-0-6 · By Roy Castleman
Already read it?
See where you stand across all six elements of the T.H.R.I.V.E. method.
Take the Freedom Score Quiz →Want to implement it with support?
Join a room of vetted service company owners working through the method together.
See the Community →