Radical Together is most applicable to church leaders but any church member can benefit from reading it. Basically, this book is a call to abandon "church as usual" and to increase our energies and giving toward the needs in this world.
One of the most powerful thoughts for me was that often good things keep us from doing the best things. The question is not, "what's wrong with it," but "how can we best impact the world for Christ." Platt calls us to lay everything on the table before God and honestly seek Him for what He wants us to be about.
Throughout the book, Platt shares examples and stories from his own congregation and their struggle to be totally devoted to Christ. I would encourage all pastors to read this book and begin leading your church to be radical for Christ.