I can't recommend this book highly enough. As I read through it, I would often stop my wife in whatever she was doing and read quotes to her.
Robert Coleman does an inductive study of the book of Acts to come up with principles of ministry. He wrote a similar book, The Master Plan of Evangelism, where he does the same thing with the Gospels to see how Jesus did ministry.
In this book, he's especially looking for how the apostles and early church put into practice the things that Jesus taught and modeled for them in the Gospels. Coleman's observation of the text is impeccable, his interpretation is clear, and his application is convicting and specific without being too dated.
The model for ministry presented here is very simple. However, if we put it into practice, there's no telling how much impact God would give us in the world.
The vision of the kingdom must always be before us: Christ will build his church, so we can't lose.
We must look for people who are willing to respond to the Lord. We plug them into community, give them some work to do (places where they can use their gifts and serve others), and call them to walk in increasing faith and obedience.
As we make this investment in others, we must rely wholly upon the Lord to make things happen by His Spirit.
In short, "if making disciples of all nations is not the heartbeat of our life, something is wrong, either with our understanding of Christ's church or our willingness to walk in His way" (p.15).
There are a number of points on which I would disagree with Coleman. On almost all of these points, Coleman gets away from the text of Acts, which loosens the quality of his argument. However, he doesn't focus on any of these things (most of them get no more than a paragraph). Some examples are:
-house churches
-congregationalism
-tongues and prophecy gifts
I don't think these ecclesiological particulars need to distract from the overall model and argument of the book. I think his main points are well demonstrated from the text.
To take a random example, pages 94-95 discuss how the church in Acts rejoiced in adversity. Coleman states the point, and then lists every example of the point from the book of Acts. He even throws in a few examples from epistles (which he does often enough to strengthen his points - he's not arguing from narrative alone) and one from the church fathers.