The Enemy Within by Kris Lundgaard: This book is for counselors and counselees who need a good understanding the power of sin, how sin works, the destruction caused by sin, and how to kill sin at the root. The author has based this book on the works of John Owen with updated language and practical examples. There are questions at the end of each chapter. This book is a little longer and more involved than Killing Sin Habits.
Killing Sin Habits by Stuart Scott: This book is for sinners. Stuart Scott addresses the sins that are entrenched habits. It is not enough to do battle with these sins, they must be completely mortified, or killed. Each chapter focuses on specific scriptures to lead the reader through God's view of sin and how we are set free through Christ. Scott walks through the repentance, renewed mind, and replacing with holiness and righteousness steps of Ephesians 4:22-24 and includes a very practical battle plan for killing sin that a counselee can use as an outline for their own sin. This is a short, easy to read book that will benefit anyone entrenched in a sin habit.
A Fight to the Death by Wayne Mack: This book is very similar to The Enemy Within and Killing Sin Habits. It is the longest of the three and is typical Mack with tons of scriptures and lots and lots of discussion questions. The three books are probably all equal in their understanding of killing sin and preference of length and writing style will be the determining factor for you.
Trapped (Getting Free From People, Patterns and Problems) by Andy Farmer: Each chapter addresses a "trap" and how freedom is only found in Christ. "Jesus came to die, and his death is the ransom, the payment, the cost of setting people free." This book address life-enslaving traps of approval, laziness, secret escape, addictions, and troubled marriage. He shows how Christ can set each person free from each trap. Woven throughout the book is the put off, renew mind, put on pattern of transformation.