I've read the book and I'm going to write my thoughts now.
1. You're talking about the Necker cube as a little magic. I totally agree. In psychology, there are a huge number of experiments that show that the observer influences the observed. For example, in the movie "Interstate 60," the cards trick shows that people see what they expect to see. If you don't remember, they showed cards with a red color of spades, and the main character mistakenly thought that these were not red spades but red hearts. This is a perceptual property known to all psychologists. When we see something unusual, our perception immediately pulls out a similar image and puts it on like a costume. This easily explains why in the dark or hallucinations we see monsters, angels or demons that we have already seen somewhere before, for example in drawings or in films. A person experiencing death or a religious experience sees images that are familiar in their culture - Christian, Arabic, Indian, and so on. I have many more thoughts about the possibilities of perception, but I want to switch to another topic.
2. I don't understand anything about physics, but nevertheless I can say that many of the ideas from your book are very similar to the ideas of the super-popular author Vadim Zeland in Russia. his series of books Transurfing Reality has sold millions of copies, including those published abroad. You call your model a Timeless Multiverse. Zeland also focuses on quantum physics and calls his model The Space of Variations. You describe your model on 90 pages, and Zeland spent 5 books on it, lol, and this is only the main series, not counting over 10 more books that develop/repeat his ideas. You're talking about magic, whereas Zeland's main tool is visualization. But in reality, both tools work the same way. Why? Here, Zeland is talking about such a thing as intention. Not a desire, but an intention. What is the intention? Zeland gives a brief definition: the Intention is the determination to own and to act.. A simple example: when you go to your refrigerator to get a carton of milk, that's the intention. Determination to own - you have no doubt that you will receive a carton of milk. You don't believe it, you know you're going to get it. Determination to act - you have done everything in your power to take a carton of milk. That is, you got up from the couch and went to the refrigerator. Speaking esoterically: You have shown God/The Universe/Higher Power that your desire to drink milk is not just a desire, but an intention. This can be compared to how an applicant shows interest in a future job at an interview. Looking at his burning eyes, his interest in work, and his passion for the topic, the employer thinks, "Yes, this dude really has a great intention to develop in this topic. That's why I'm hiring him." If you don't have the determination to own ("I'm not worthy!") or the determination to act ("I'm just dreaming and not doing anything else"), then nothing will work. That is, magic and visualization work because the intention is triggered. And from this point of view, in fact, ritual or visualization is not necessary. It is enough just to set the desired goal and go to it every day with the firm knowledge that you will definitely achieve your goal. And then the intention will work sooner or later.
3. However, the above does not explain some points. For example, I know that black magicians regularly encounter poltergeists when summoning entities. Windows open, things fall, and there's a knock on the door. In my opinion, this can no longer be explained by intention alone. Intention works with probabilities. You perform a ritual or visualize, and the universe increases the likelihood of achieving what you want. But the universe can't increase the chance that your doors will start slamming and things will fall off the table during the ritual. For this reason, I am already expanding the model here and admitting that there really is an otherworldly world in which live... revived ideas. People have been worshipping gods, demons, and angels for so long that they have truly come to life, taking on form and character. The intention of millions of magicians worked, and the ideas came to life. For this reason, if a magician knows how to work with these entities, he can summon a real demon/bes (this Russian word is a "бес", in English it is translated as a demon for some reason, but a bes is still not a demon, but another dark entity known in Orthodox culture). That is, to summon not just as a hallucination or a focus of one's perception, but as a real being from an invisible otherworld who is able to influence our physical world.
These are my thoughts at the moment.
I spent a few years making sure that the first section was both accurate, and self-consistent. And constantly asking myself: "Am I wrong?"