Ole Nydahl is a Buddhist teacher who lived for four years in relative hardship in the Himalayas and became a close disciple of a legendary (no exaggeration) Tibetan Buddhist teacher called "the Sixteenth Karmapa." The Sixteenth Karmapa died in 1981 but sent Ole Nydahl and his wife to the west to start Buddhist centers in his name. Since then he's started around six hundred of them.
My understanding is he typically circles the globe twice a year on a never-ending pilgrimage, spending time in each of the centers he's started. In all that time and in all those different hemispheres you can imagine how many people he's met and talked to, how many couple relationships he's seen in various stages of getting together, staying together, or flying apart. So, I'd say it's the synthesis of all that human observation you get by reading this.
That's the lens you're looking through when you open this book.
To me, even though I've been in the same relationship for many years, it felt like an eagle's-eye-view of human interactions, like gliding overhead observing the big picture. He's obviously seen everything, heard everything, and thought about it all deeply.
If it seems odd reading about pair-bonding from a tradition that seems to encourage celibacy maybe it makes more sense to think about it in terms of the profound understanding of the mind Tibetan Buddhism represents. I mean, after all, they knew about the subconscious mind a thousand years before Freud (and they call it the "store consciousness" because everything is stored there). I just offer that as an example of the depth of Buddhist psychology.
On that basis alone, aren't you a little curious about what they have to say about relationships? After all, as he says in the book, having a partner is so important to all of us because it holds such a huge possibility for happiness if we can manage it and such a miserable possibiliy for unhappiness if we can't.
So, I bought this and definitely got a lot out of it. I even intend to read it again which is fairly rare for me. Of course, I got onto this guy because I thought his Mahamudra book ("Great Seal") was one of the best books I'd ever read and read it so many times I had to take it to Kinko's and get it rebound.
Well, anyway, I enjoy this guy's thought processes. They seem very mature and based on real world experience. He's even inspiring. And as time goes by I think inspiration in life is at least as rare as falling deeply in love and maybe worth even more.
Best of luck to you, whatever your spiritual pathway.