Book of the Month: ‘The 9 to 5 Window by Os Hillman.

One of the best books I’ve read in recent months is The 9 to 5 Window by Os Hillman. It was actually recommended to me by Dr Cheryl Hill, CEO and Founder of IITBN, who knows the author personally. Her endorsement and connection to Hillman really convinced me to dive into it, and I’m so glad I did. The book helped confirm some of my thoughts about marketplace ministry, especially how our faith and professional lives are so deeply connected. It’s not just about personal growth—it’s about learning how to be influential in your workplace and transform the environment around you.

Hillman highlights that the workplace is a significant mission field, and he introduces the concept of the « Seven Mountains of Culture »—business, government, education, and others—where Christians can bring about change. What’s great about the book is how practical it is. Hillman isn’t suggesting we become overly religious at work but rather that we live out our faith through integrity, leadership, and ethical decision-making.

Why The 9 to 5 Window is a Must-Read for Christian Professionals

This book is essential for any Christian who wants to integrate their faith with their professional life. Hillman gives tangible advice on how to approach your work with a kingdom mindset. Whether you’re in a leadership position or just starting out in your career, The 9 to 5 Window shows you how to be a quiet but powerful influence through your actions, decisions, and leadership. It’s a guide to living your faith in a way that’s effective and authentic in any workplace setting.

Impact on Influence

One of the main takeaways for me was the power of subtle, Christ-like influence. You don’t have to preach to be effective. By consistently applying biblical principles—like fairness, humility, and ethical behaviour—you can impact not just your colleagues but the entire culture of your workplace. Hillman shows how this kind of influence can extend to systems, policies, and even industries. For anyone serious about living their faith in the marketplace, this book is an invaluable resource.

If you’re looking to make an impact in your work environment without compromising your values, this book is a must-read.