These truly are "historic" essays within the biblical counseling movement--at least, the ideas they contain and the men who penned them are foundational to the movement.
After a brief introduction by Heath Lambert, there are four essays. Wayne Mack defines the movement in "What is Biblical Counseling?", setting side-by-side the limitations and weaknesses of secular psychology and the richness and strength of biblical counseling. I have long thought about the relationship between biblical counseling and secular psychology, and I felt that Mack perfectly summarized this relationship by giving psychology an "illustrative" and "provocative" role, but not a necessary role. In other words, a biblical counselor does not need to read Freud to biblically counsel; and at the same time, I am sure that most of the men writing this book have read Freud to provide illustration for and to provoke their thinking.
Doug Bookman's article, "The Word of God and Counseling," was the most theoretically useful and challenging for me. He refutes: the "Two-Book Approach" to counseling which basically makes the Bible equal to modern scientific insights; the "No-Book Approach," which views biblical hermeneutics so skeptically that the Bible becomes hardly a useful book in counseling at all; and the "Rule-Book Approach," which weighs secular insights by the Scriptures, an approach superior to the others but which assumes, rather than proves, that secular psychology has anything substantial for biblical counselors to weigh.
David Powlison's article was titled "The Sufficiency of Scripture to Diagnose and Cure Souls." While it was perhaps the least rigorous in structure and argument, it was the most useful in practical wisdom and application. Our deepest problems, which psychology labels variously, are summarized in Scripture by the phrase "lusts of the flesh." If these are our core problems, then the Bible does indeed provide the cure for them.
Lastly, Heath Lambert contributes a new article for this collection (the others are drawn from the past), called "Counsel the Sufficient Word." Here he exposits a passage from 2 Peter 1 to show the power of God's word.
Overall, this was exactly the sort of book I was looking for, one which thinks carefully about the sufficiency of Scripture in counseling. The church I pastor exists "to exalt Christ and the sufficiency of his word." This book helps us do the latter as we help people work through the most difficult issues of life.