God has always been involved in the deliverance ministry. God is the originator of the ministry of deliverance.
The Bible records acts of God in the Old Testament that produced deliverance and Jesus became the visible and tangible expression of God's delivering ability and power in the New Testament.
Jesus said that "greater works shall you do" (John 14:12) when speaking to us while talking to His disciples. Since He was talking to us, not a select few, we need to be equipped and armed with basic knowledge about engaging, removing, and replacing satan's kingdom while here on earth.
This is a basic training manual that covers the fundamentals of deliverance.