The popup book was not really a dream it was one of several visions that I had after coming out of an herbal shamanic trip I undertook several years ago. I felt among other things that my whole life was the amount of time it took this very large being to read and turn a page in his book, so I wanted to make him linger on my page. I also felt this whole universe was a piece of dust on a large man's broom that he was in the process of sweeping and I could alternate between the consciousness of myself or the large man. Lastly I felt that the whole of our existence was a dream of god who was beginning to awaken.
As i said though this was me being hurled into other dimensions with shamanic herbs. So like your mushroom awarenss this was a different sort of trip induction wise at least.
I thought I referenced that when we discussed when I had the dream a while ago where the cheerleader was cheering for ME! You had mentioned a dream where you felt you were in a book. Some of these conversations seem Deja Vu though like we have had them before.