 Somehow amidst all this he found time to pen his autobiography, "Vom Jaeger zum Flieger" ("From Soldier to Pilot").Schäfer was then given command of "Jasta 28" on 26 April, and after gaining further victories for a total of 30 claims Schäfer was shot down and killed in action on 5 June 1917 in combat with No.20 Squadron, by ace crew Lt. Harold Satchell and Lt. Thomas Lewis.