I am rarely moved to write reviews on here, but in this case it is totally necessary. I have never read such a badly written text. My first year undergraduates write very poorly at times, but even they write more clearly, with more focus, and with better basic grammar than Mr Harris.
If you can get past the convoluted and poorly structured narrative, then you'll find the content - but there is very little. Just a load of words put together in a pseudo random order on 148 pages. I'm not sure I found any mention of web 3.0 other than in the title. There is no evidence that Mr Harris has any authority on the subject, there are no references to other work (even though one section appears to be a book review).
I did wonder who would publish such a thing - but there is no publisher information in the book...
I really don't know what this book is... other than Mr Harris' thoughts put down on paper (with little thought), but it's certainly not worth the money. Please don't make the same mistake I did.