After killing Miraak, is there any way to return to Chapter V of Waking Dreams? In all the other books you can backtrack to previous chapters by retracing your steps, but for Waking Dreams there's this part which Sahotaar carried you, and of course the door behind you locks even before that. I realised I forgot to pick up the four "On Apocrypha" books on the 4 pedestals after activating the centre book in Chapter 5, and I wanted to take the set home to place in my bookshelf. I have a bad feeling that I'll need to reload the save in Chapter V, take the books, and then move to Chapter VI.

Or does anyone know if those 4 books are not keepable (in that the book portal to Chapter VI requires the four books to be on the pedestals)?

On an unrelated note, do the Control Cubes ever lose their quest item status? I wanted to take them home to keep on a shelf (or even just one will do) but they were still flagged as quest items after the quest ended. Is that normal?

Not sure about the four books,I don't think you can keep them,or drop them ?

I was able to take the cubes and drop them.