The text has beautiful pictures. It covers the psychology of a pair, experiencing a third partner. The dialogs make fun. Far ahead of normal Platon/Freud stuff. You're not the third person reader, you get inside the characters not thru their thoughts, but by their behavior and their words.
The book gives the 3 another meaning, it's just a temporary state, which converts to a chaotic 2 again and again, for example when David the main-acteur writes about his father and his wife Catherine destroys the text and he is forced to rewrite it...
In my opinion the quantum world is similiar, you have a set of three particles, which interchange to form a dual interaction
Or the dual force in the three dimensions...
But on the surface people meet the first time and then want to gather 4 a new relation 2 be free until the mind demands a count-on !
Never read such a good text !!