Absolultely one of the best books ever written. It is a must read for every Christian. It will tell you how to effectively share your faith with anyone. He is practical, insightful and great writer. You will want to go out and witness to your neighbors after reading this book. I loved it and bought extra copies to give away.
This is a powerful book which has helped me get out of my comfort zone to share Christ with others. It is convicting, equipping and inspiring. Great material for a small group study...you can get a study guide for One Thing at markcahill.org. Cahill has a great love for the lost. He conference-called our small group for 45 minutes one evening when we were going through One Thing. Consider buying copies of One Thing and passing them out. I've done this in a local jail, to folks in Mexico and Canada and people get fired up to share the Gospel. You can impact eternity for Christ in many ways through reading and sharing this book. Time is short, you may not have tomorrow so what are you waiting for? What are you willing to do to hear "Well done good and faithful servant"?