So Great Salvation, Ryrie Edition by Charles C Ryrie and published by Classics.
The purpose of this book is to share with believers what it means to believe in Jesus Christ. "In an age when there is a tendency either to water down the Gospel or add to it requirements that are not scriptural, people need a clear, concise, and authoritative word on the meaning and evidences of salvation. And that is exactly what Charles Ryrie provides in the pages of this timely book."
This book helps us to understand what salvation is and how God works this miracle in our lives. He shows us how we can be confident of our salvation and certain that we are forgiven and destined in heaven.