Bill Hull is a discipleship evangelist. His passion is to help the church return to its disciple-making roots. This God-given desire has manifested itself in 20 years of serving in pastoral service and authoring 25 books, including Jesus Christ Disciplemaker, The Disciple-Making Pastor, and The Disciple-Making Church. Bill speaks about discipleship around the world to both congregations and leaders. He is also a co-founder of The Bonhoeffer Project (www.thebonhoefferproject.com), a group of nationally known thought leaders championing a "new" gospel-that which Jesus taught-saying that those who are called to salvation are called to discipleship. Bill and his wife, Jane, make their home in Long Beach, California, and are the parents of two grown sons. More about Bill can be found at www.billhull.net. Brandon Cook serves as lead pastor at Long Beach Christian Fellowship and is a co-founder of The Bonhoeffer Project. He is also an apprentice trainer with Reinvent Ministries (www.reinventministries.org) and co-host of The Desire Line Podcast (www.desirelinepodcast.com). Originally from Birmingham, Alabama, Brandon has studied at Wheaton College, Jerusalem University College, Brandeis University, and The Oxford Centre for Hebrew and Jewish Studies. He lives in Long Beach, California, with his wife, Rebecca, and their three children. Follow his photography on Instagram at @brandonalancook and read his poetry and other writings at www.storyflight.com. Dr. Bobby Harrington is founding and Lead Pastor of Harpeth Christian Church (by the Harpeth River, in Franklin, just south of Nashville). He is the founder and CEO of discipleship.org (Jesus' method of disciple-making) and a co-founder and CEO of Renew.org (Jesus' teachings to fuel disciple making). He has written or co-written 13 books. He champions the teachings of Jesus and pours gasoline on the fires of disciple-making, which is helping people to trust and follow Jesus. He is a Canadian now living in Nashville. He loves family, hockey, football, politics, and traveling to Israel. He has two children and two grand-children. He writes in collaboration with other leaders who champion the ways of Jesus.