I bought this book on an impulse (the premise seemed intriguing) and I have to say I have not enjoyed it very much. I am on the last 20 pages now and it has been really hard going.
The problem is with how the book is structured. For some reason the author chose to combine various vignettes together and seemingly randomly group them in chapters. There is no flow of narrative, no characters to interest the reader, no feeling for the place where the author is at a particular moment, no context, no placement in time; most of the time we have no idea when is a particular scene taking place. Worse, at times I found myself not knowing where! The author would start a paragraph mentioning whatever fact about a place (say, Bali) then two sentences after that, in the same paragraph, he would mention something about a Carribbean island that had a thing in common with Bali, and for the rest of the chapter would keep talking about 'that' place; I found myself scratching my head wondering if he was in Bali or in the Carribbean, because it was not clear at all (to me). Also the people in his book are remarkably uni-dimensional, and there seems to be little difference between Melanesian John and American John, since no real descriptions or character studies are provided.
The author uses this gimmick to string paragraphs together repeatedly: he mentions something about some place, then the same thing about a different place, and this mechanism supposedly provides the passage from one place to another. While some may find this stream of conscioussness type of writing interesting, I quickly tired of it, and in hindsight it appears a 'cheap' way of connecting unrelated fragments and avoiding proper narrative. It does not give the book any kind of depth and I found myself not very interested in picking it up again because really there was nothing to return to.
It is too bad because there is a lot of material here. By comparison, Theroux's "Happy Isles of Oceania" is a masterpiece.
Take this one to the beach, leaf through it, but don't expect to be gripped.