While widely practiced (and sometimes abused) in charismatic circles, the gift of prophecy is largely ignored in evangelical churches. If its mentioned at all, it's in the context of social justice or speaking truth to power. However, there's no reason to believe that the spiritual gift of prophecy as practiced in the New Testament - foretelling future events, revealing revelations or words of knowledge - has come to an end.
Jack Deere's book provides important and biblical insights into this gift along with practical suggestions for cultivating it within a corporate context. His experience in this area has made him aware of the dangers that can emerge within prophetic ministry, which he addresses.
At a practical level, this book provides a good though incomplete introduction to prophetic ministry. So why only 3 stars?
First, in my experience hearing the voice of God requires silencing all other internal voices. While Deere acknowledges that we can mistake our internal voices for the voice of God, he offers no real advice for addressing this other than practice.
Second, while I agree that prophetic ministry can be practiced by all (just as evangelism or teaching aren't limited to those with those gifts), I believe there's a danger in assuming that we can become prolific in prophetic ministry. Prophesies, as Deere states, are gifts. It's dangerous to assume that there are prophetic messages readily available. They may be, but they may not as well. Some may never receive prophetic messages, while others may receive only a few over the course of a lifetime. Deere gives the impression that we can receive such messages just about whenever we want them.
Third, his endorsement of people like Mike Bickel and Rick Joyner shows a lack of discernment. The book was written before the scandals associated with these men were known, but one would think that someone with a high sense of the prophetic would have been more discerning. Since then, Deere has stated that Bickel is unfit for ministry.
Fourth, most of the examples of prophetic ministry that he cites are from the stage. In my experience, public prophecy like this is easily abused, and I prefer to practice the gift in more private settings. Additionally, in many of the examples he speaks of general prophecies becoming more clear. However, this can also be easily abused. For example, publicly stating that "there is someone here in need in prayer for a health issue" is a safe bet. One need not be prophetic to make such a statement.
Lastly, while he states at the end that the goal of prophetic ministry is to reveal Jesus, he doesn't unpack prophetic ministry in light of Jesus, our Prophet. For prophetic ministry to be healthy, it needs to be Christological.
Deere's book is a good resource, though incomplete. It needs to be read in a discerning way. If one is new to prophetic ministry, it would be good to read this book with someone who is more experienced.