Once someone is saved by God's grace through faith in Jesus Christ, how are they able to make theological decisions about what they believe as a Christian? How can Christians have assurance and security of their salvation, and by what beliefs and principles should they choose to live their lives? The answers to these questions and many more depend on a strong understanding of God's Word and knowledge of the specific theological systems that best represent God's message in the Bible. In his enlightening and informative guide, Salvation and Christian Theology: A Comparison of Protestant Theological Systems, author Jack K. Mayfield gives readers a detailed comparison of the characteristics of a variety of Protestant Christian theological systems, including each system's views on human redemption. First conceptualized during the author's seminary studies as a resourceful handbook for Christians struggling to understand historical church theologians/theology, Mayfield designed this guide with the goal of aiding Christians in choosing the theological system that best matches their beliefs. The text covers numerous theologies, including Calvinism, Lutheranism, Arminian, Wesleyan, and Free Grace systems, and includes useful supplemental tools to aid the readers' study, including a glossary of theological terms, charted breakdowns of various theological systems, and an extensive list of theological concepts found in specific Scriptures, with over 3,400 footnotes to support Mayfield's research. The author's goal is to give Christians a better foundation for finding a theological home for their beliefs, which in turn will influence their Christian mission and lifestyles choices. Jack Kendall Mayfield, BA/MD (Indiana University), MS (Medical College of Wisconsin), MDiv (Western Conservative Baptist/Phoenix Seminary) is a retired scientist, physician and orthopedic surgeon. He was a Captain in the USAF and later was the medical director of NEED International, an evangelistic organization that developed Christian schools and provided Christian education in India and medical education in Vietnam. His evangelistic and medical mission efforts were focused in Da Nang and Hanoi, Vietnam. He also served on short-term medical missions in Ecuador, St. Lucia, Russia, and the Amazon in Brazil. He has been a guest lecturer in Phoenix, Arizona on world religions, bioethics and apologetics at Southwestern College and on bioethics, apologetics and science at Phoenix Seminary. He has also been a guest lecturer on apologetics and science at Grace School of Theology, Houston, Texas. He and his wife, Cathy, split their time between living in Longmont, Colorado and Phoenix, Arizona and spending time with their three grown children and nine grandchildren.