If you are referring to the Latter day saints you haven't a clue what you are talking about. Spirits that have been restricted from having bodies from the beginning prefer not to share this nature with anyone who might be able to deny them something were their true form to be known and they get a kick out of prompting fear but thats just par for course. They who love their God usually want to be like them.
They who love their neighbor usually want to be liberal and free with their neighbors and they who love themselves respect what God has caused to be their nature and to appreciate its faults and flaws. I have never heard of love or the a member of the office of the Holy Ghost in desperate need of someone changing themselves into a door stop for some great purpose.
The ONLY Book to be reading is the True infallible Word of God! This that you write of is tapping into the realm of demonic mysticism. The Bible speaks of an Abyss between the dead and the living, and that once crossed over, one can never return!
These spirits that you are referring to are of a demonic nature, and can take on the "characteristics" of another. The Bible talks of this where the devil can present himself as "an angel of light". Yes, spirits (demons) look for "houses" to dwell in, this is to carry out evil deeds, as in the case of the demon-possessed individual.In the same sense, the Holy Ghost dwells in man as well, but only to carry out God's will in the earth.
Once we die, we return back to God from whence we came. I don't believe that there is anything that states what happens from that point, accept for what Jesus says in the gospels concerning the matters of eternity.
The Bible also states that to be absent from the body, is to be present with the Lord. I believe that we need to try and meditate on the things of God, instead of worrying about petty things that will not bring souls to the saving knowledge of the truth (Jesus Christ and .
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.