I'm tempted to be lazy and do a summary review of all of the first three R.T. books, but I will focus on the first, which just pulled me in like nothing else, and convinced me I need to read the remainder of Vadim's books (the English versions of 4 and 5 are being released in November and I've pre-ordered those).
From what I remember of the first book, it's main purpose is convince you that everything that caused you want to act like a victim and react angrily, or worry-ily (yep that's a word now), or with fear, or driven by scarcity ... all these "reasons" to act in those limited, low-Consciousness ways, are based on pure Falsity and have no real significance. In this first book, you're introduced to a "life-form" (but not really a life-form exactly) called a pendulum. An example of a "pendulum" could be a company that wants to make you follow its rules and bend your life around it, and fear being separated from it. Really, a pendulum is anything that a group of people give its energy to, without really being aware that they are doing this.
Also discussed, are "life-tracks" (which is closely related to the sub-title of this book, Space of Variations), of which there are many, and whichever life track you end up on, is a result of the kinds of habitual emotional responses you have to normal everyday irritations and happenings.. if you treat annoyances as being real or having importance, and thus give that thing your angry or fearful energy, you will *not* end up on a lifetrack where a desired objective would materialize (I guess by lifetracks, this could be similar to parallel universes of which are spoken of, by many writers .. you choose which one by your beliefs and/or your emotion-based reactions)
In the previous paragraph, I mentioned "Importance". I'd say this might be one of the top 3 primary themes that he revisits and repeats through the 3 books (and I'm guessing I'll see it repeated in books 4 and 5). There's a reason behind such focus on this theme: It hold such a heavy weight on all of the factors that play into your living in a joy-filled 'life track'. If you hold too much importance on the fact that you don't have this or that, or too much importance on negative circumstances, this not only keeps you off the Life track you want, but as well, triggers the "Balancing" forces that this book also covers.
It's a given that you are into this genre of material, The Reality Transurfing series is one that you will read and re-read.