Greg Gilbert (MDiv, The Southern Baptist Theological Seminary) is senior pastor at Third Avenue Baptist Church in Louisville, Kentucky. He is the author of What Is the Gospel?, Why Trust the Bible? Who is Jesus?, James: A 12-Week Study, and is the co-author (with Kevin DeYoung) of What Is the Mission of the Church?

What Is the Gospel? can be found here

Jonathan Leeman is the editorial director for 9Marks. After doing undergraduate and graduate degrees in political science, Jonathan began his career in journalism where he worked as an editor for an international economics magazine in Washington, D. C. Since his call to ministry, Jonathan has earned a master of divinity and a Ph.D. in theology and worked as an interim pastor. He also serves as an elder at Cheverly Baptist Church in Cheverly, Maryland. Jonathan teaches for a number of seminaries, including The Southern Baptist Theological Seminary, Southeastern Baptist Theological Seminary, and the Reformed Theological Seminary.

For more on 9Marks visit www.9marks.org

Jonathan's latest book, How the Nations Rage: Rethinking Faith and Politics in a Divided Age, can be purchased here

Bob Kauflin serves as the Director of Sovereign Grace Music. He’s written two books: Worship Matters (published 2008 by Crossway) and True Worshipers (published 2015 by Crossway). Through conferences, seminars, and his blog, Worship Matters, he seeks to equip pastors, musicians, and songwriters in the theology and practice of congregational worship. He also oversees the production of Sovereign Grace Music albums. He currently has the joy of being a pastor at Sovereign Grace Church of Louisville.

Worship Matters can be purchased here

True Worshipers can be purchased here

Prayers of the Saints Live can be purchased here

Matt Merker serves as Pastoral Assistant at Capitol Hill Baptist Church in Washington, D.C.

Matt writes Christ-centered songs for churches. His goal is to compose hymns that express glorious truths about God with singable and timeless melodies. Matt’s music reflects the full spectrum of the Christian life, from sorrowful yearning to joyful hope.

Visit Matt's website here

David Mathis' article - Not a Hillsong to Die On

Bob Kauflin's article - Singing Songs from Questionable Sources

Carl Truman's article - What Can Miserable Christian's Sing?

9Marks Weekender information can be found here