The Foundational Concepts Theological Reader is the first in the four-part TR series. It is the textbook for Walking in the Way (WitW) Part 1, and serves as a guide for teachers who are leading the discussions through the WitW Part 1 Study Guide Series. It also serves as the introduction to WitW Part 2, the Gospel of the Kingdom of God, and WitW Part 3, The Gospel of God. Taken together, the four-part TR set presents the Christian gospel in all its richness and fullness, including its practical application to all aspects of life and ministry. It stands as a useful resource for practical Christian theology, uncompromising Christian discipleship, and building a biblical worldview.