The Bookends of the Christian Life, by Jerry Bridges and Bob Bevington
This book has been a great blessing to me. C. J. Mahaney says of it:
“Forgiveness of sin and power to change — I can think of no more essential topics for a Christian to study than these twin blessings of the gospel. And I can think of no one better to write on these topics ” than Jerry Bridges. Jerry has provided for me over the years a constant diet of gospel-saturated writing, and here is a fresh feast. I trust you will enjoy it as much as I have.”
Read sample pages here [PDF]