This sobering study confronts the reality of Satan and the spiritual battle that surrounds every Christian life. With clarity and theological insight, it explains the nature of the devil, the activity of fallen angels, and the many ways temptation works upon the human soul. At the same time, these pages offer strong reassurance that, with the help of God’s grace and the protection of the holy angels, the faithful can recognize the enemy’s tactics, resist his assaults, and transform trials into opportunities for spiritual victory.