Every missionary is given textbooks and training to cover the curriculum of missionary work, but by the end of their service, a missionary will learn much deeper nuances of how to teach and minister to people. Mission Theory collects these powerful ideas to give any missionary a head start and enter the mission field a little less green. From the active duty of Phillip Goodwin and his time teaching at the Missionary Training Center in Provo, Mission Theory started as an unofficial user manual for his little brother but has since gone to missionaries around the world.