Very little is actually known about Mark. He did at one time serve with Paul and Barnabus on their missionary journeys. However, he was not one of the original 12 apostles. Peter and Mark were close friends, so much of the gospel is probably based on Peter's eyewitness. This is the shortest gospel and probably the first written. This book moves very quickly, and he uses the word immediately quite often. Mark focuses on the service and sacrifice of Jesus. We see him preaching, teaching and healing. After the Resurrection, He tells his followers to continue His work in His power. That is us. We are the ones that are following close after him. Are you doing His work?