A Psalter/Commentary combining in-depth study of Psalms 90–150 with 140 new songs. This volume, encompassing Psalms 90–150, is the final volume of the series. Volume one covered Psalms 1–41, and volume two incorporated Psalms 42–89. The intent of this series is not to produce technical volumes; rather, they are intended for use by church leaders, ministers, informed lay persons, and Bible teachers to obtain basic understanding of some of the concerns and issues found in a particular psalm, and go from there to an application of the psalm for present-day worship in song. For each psalm there is a translation, treatment of its structure and theology, and then two or more musical settings. This variety demonstrates several ways of bringing the Psalms into Christian worship. Most of the music in Timeless is intended for congregational singing. Timeless is an ecumenical and international project. While having its origin in the a cappella tradition of Churches of Christ, the book is based on the conviction that all Christian communions share the original hymnbook of the second temple and the church. The editor, therefore, has solicited commentaries, compositions, and lyrics from a broad range of Christian traditions.