Absolute Surrender is a wonderful devotional. Based around a series of sermons by Andrew Murray, Absolute Surrender extols the need for "absolute surrender" to God.
Murray provides concrete steps for bringing about such surrender in one's life. He also describes both the fruit of surrendering, e.g. true experience of the Holy Spirit in one's life, and the different "stages" one goes through on the "path to Christian liberty." Thus, anyone not fully experiencing Christian liberty can profit from reading this book, either in a group Bible study or simply in personal study.
Full of insight, Absolute Surrender is a timeless classic.