i read the book too. it is a very good, and interesting book.
in regards to your questions, i may have some usful data:
1) the 'prison' goes beyond the level we are incarnated in.
(when i say 'level' one may also use the word 'plane' or 'dimension' or, call it a 'sub-space' realm, etc. pretty much the same thing. and there may be many. tied into the 'multi-verse' theory, though, not a mere 'theory' at all.)
i am working on knowing how many of these 'dimensions' are controlled by 'them' (and how many there are) and we all need to know which one(s) if any, are outside of this feudal system.
but, if there are any outside of the heirarchy, then, that would be the level(s) you want.
the rest, are prisons, or part of the control-grid. all biological life came from this.
they use biological bodies as traps.
they (some entities that have gone insane long ago) created biological life, to impose sufffering.
2) if it is in a biological body, then, it is a spirit that is trapped in it.
anything that can die, is in the trap.
even the reptoids and grays and other off-world species, being biological themselves, are mere enslaved slave-masters, themselves, as they answer to an authority-figure above them, and are all part of a feudal hierarchy that goes on above them.
they are just the mid-level pawns.
if you are wanting help from anyone, you are barking up the wrong tree if they are incarnated.
that is where the cry for help from the 'federation' is going wrong, and i tried to inform courtney about that, but it looks so far as if it may have fallen on deaf ears, or, my message was lost along the wayside....
3) unless you are completely in control and 100% perfectly lucid, dreamstate could be manipulated.
but, sometimes, something can get thru, though beware, some are impostors/manipulations, and it could be difficult to tell, if you are not lucid.
4) i also know that literally all religious figureheads (in spite of who they are, it does not matter who they are) are all part of the secret/hidden feudal hierarchic hegelian-dialectic system that cannot be trusted.
everyone's been lied to. unfortunately, most have a case of 'cognitive-dissonance' and do not recognise this, and, from my own experience, some could get hostile towards the messenger that may feel the need to try to 'wake' them...
even remote-viewing, is best done outside of these levels. one would need to remote-view **outside** of the levels that are part of the heirarchic-controlled ones, in order to get past the potential for manipulators.