It has been said, "Idle hands are the devil's workshop." In reality, there are many tools in the devil's workshop, such as an uncontrolled thought life, profanity, lying, stealing, gossip, and disrespect. These may seem like obvious tools, yet, many are deceived by them. "Lack of knowledge" (Hosea 4:6) gives the devil a great advantage over the Christian.
The thirteen lessons in this book warn of the dangers of some of the devil's most useful tools. Through Bible study and daily prayer, we do not have to be "ignorant of [Satan's] devices" (2 Corinthians 2:11), but we can be overcomers "through Christ which strengtheneth me" (Philippians 4:13).