A dry, dull badly written book. As one reviewer has already said, this book quotes verbatim those who knew Hendrix whether or not what they have to say is interesting. Despite the amount of research that went into the book, the author makes several factual errors in the text, particularly when dealing with guitar related facts (eg. his description of how Hendrix creates the sound at the beginning of 'Foxy Lady' is nonsense).
Towards the end of the book, he offers the opinion that the Blues is a useless, uninteresting form of music. This is an extaordinary assertion considering how much of a blues afficianado Hendrix was - one story in particular that comes to mind is that of a young Hendrix at the front of a Buddy Guy gig with a tape recorder. If the author is to dismiss the foundation of all Hendrix's music (though to say he pushed the boundaries is an understatement), then perhaps he shouldn't try to write about it.
Sadly, this is the only original thought you will find here.
Overall, the book can be summarised in one word - souless. The facts are there (some interesting, many not), but there's nothing to hold your interest or excite the senses in any way