This fully-documented, 801-page volume will take the reader from the origin of eternal security or once saved, always saved (OSAS) to the present time, as the contemporary OSAS teachers of our day are quoted hundreds of times and their teachings are examined under the light of God's truth. If you are like many, among other things, you will be shocked to learn that the teaching of OSAS is sometimes equated to grace and the gospel! Furthermore, the chapters exposing Calvin's dark side and unmasking the Synod of Dort (1618-1619), will give a factual, historical account that seems to be little known in our day. But most importantly, hundreds of Scriptures are cited in both offensive and defensive ways that will substantiate The Believer's Conditional Security.