That is an awesome book by Joyce Meyer and so is Francis Frangipane's book titled something like
The Three Battlefields (mind is included)...
The body, spirit and soul (mind, will and emotions) are the playground for spiritual warfare (no play; just war).
The enemy will attack in whatever areas that we allow....yes, I said that we allow Him...He doesn't come "into our yard unless we leave the gate open".
1 John 4:4
Ye are of God, little children, and have overcome them:
because greater is he that is in you, than he that is in the world.