I have now collected half a dozen books on church growth, surveying your congregation, and methods to lead a faith-based organization and this is the best of the lot. Dr. Thom Rainer has done an excellent job of researching people who recently made a decision for Christ and joined a church as adults. Some of the results are surprising.
People who have something missing in their lives are not looking for pop psychology or watered-down messages - they are looking for truth and a community of faith who are friendly to people they have never met before. (We all think we are friendly, but what would someone who is meeting you for the first time think about your congregation?) High expectations of new members, Excellence and quality of worship, and cleanliness of facilities were some other surprises. The surveys at the end of the book are thought-provoking. The leadership survey (for pastors) and Church Health survey (for the congregation) are scored by The Rainer Group. The Unchurched-Reaching Readiness Inventory is self-scoring. All appear well-designed and comprehensive, with good correlation questions.
There is an excellent chapter on characteristics of pastors of churches who reach the unchurched. They aren't good at maintenance tasks (weddings, funerals, hospital visitation) but are excellent at preaching, communication, vision, and leading the congregation. Hmmm... it seems this is what the Apostles did in Acts. They equipped others to do the daily work of the church and did the teaching and evangelizing.
If you want a church that only tends to its own members, you will not like this book. But if you want to know how to reach the unchurched, how to grow your congregation (not by moving members over from other churches), then this is a book full of insights and hard data that can really help stir ideas and action to move Christians toward fulfilling the Great Commission of Matthew 28.