I purchased this book at a conference after a friend of mine (who hadn't even read it!) suggested it to me. It is perhaps the best book on evangelism that I have read (with Becoming a Contagious Christian by Bill Hybels a close second). Any Christian could share with you the importance of evangelism, and most could probably offer a suggestion of "how to". But this book breaks out of the box that so often limits our evangelism efforts.
As someone trained and practiced in the use of the Four Spiritual Laws (a gospel presentation frequently used by Campus Crusade for Christ, the organization of which Tim Downs is a part), I am relatively comfortable in "random" evangelism. But I have often struggled with reconciling such evangelistic attempts with being a "real" person. This book has helped me (and continues to, along with prayer and Scripture) to bridge that gap. Mr. Downs goes far beyond just a gospel presentation, but instead points readers in the direction of allowing their Christianity to spill over into every area of their life, thereby breaking the limits we so often place on our own evangelism efforts.
But beyond that, he also focuses on how to communicate with those who don't share the same worldview that we have become indoctrinated in. Many times, I've found that outreaches offered around me have been appealing to those who have grown up in the Bible belt and share this worldview, though don't actually consider themselves believers. But these often don't appeal to people who specifically disagree with elements of my worldview. How, then, do we reach out to these people?
This book is full of relevant, scriptural insight. It is worth every dollar you spend.