How do I love this book? Let me count the ways!
First, it is thoroughly biblical from start to finish. Anyabwile firmly grounds everything he says in Scripture. His treatment of the qualifications of both deacons and elders (in that order) largely consists of a verse-by-verse or even phrase-by-phrase exegesis of 1 Timothy chapters 3-4.
Second, this book is short and to the point. There is no filler or wasted space. He gets right to the point and stays on point in each chapter.
Third, both church officer & laity alike will benefit from this book. As a pastor, I not only found this book to be useful in clarifying my understanding of the nature and work of the offices of elder & deacon, but also found it to be more than a little edifying & encouraging as well. Church members who want to be more well-informed in their nomination & election of church officers will also find it immensely helpful.
Another thing that I greatly appreciated was that Anyabwile did not just focus on the qualifications of elders or pastors (part 2 of the book), but also dedicated the entire third section of the book to the work that they are called to do. Again, this section would be good for pastor/elder & laity alike. We often have unbiblical notions or expectations about what our pastors and ruling elders are called to do, and this can cause much confusion and unnecessary difficulty in the church.
There is much more that could be said, but suffice it to say that I highly recommend this book. I will almost certainly be referring to it (and re-reading it!) in the future. And I hope that I am not alone in that regard.