John Piper is founder and teacher of desiringGod.org and chancellor of Bethlehem College & Seminary. For thirty-three years, he served as pastor at Bethlehem Baptist Church, Minneapolis, Minnesota. John and his wife, Noël, have four sons, a daughter, and twelve grandchildren. He is the author of more than seventy books.
George W. Sarris is an actor, author, narrator, and storyteller. He has narrated audiobooks on a wide range of topics and has consistently received high reviews for his work. He holds a Bachelor of Science in Speech from Northwestern University and a Master of Divinity from Gordon-Conwell Theological Seminary.