Like all the Hal Leonard "Recorded Guitar Versions" books I've seen, this is pretty much spot on- none of your simplified open-chord-only rubbish here, just accurate tabbing of the highest quality.
Therein lies the one possible reason you could have for not buying this book straight away (well, unless you don't like the blues... no, that'd be silly...), because the legend that this guy swapped his soul for his playing skills exists for a good reason- he was hot. Damn hot.
And this book isn't easy going. There's a nice little bit in the front telling you a bit about the book, its origins and importance, but after that, you're on your own. I thought I was an ok player, but I've been suitably cut down to size in just one morning and left with a bruised ego and sore fingers.
Despite this, there's a lot in this book that can benefit even novice players- inventive tunings, gorgeous obscure chords and perfect rhythms that, if nothing else, can be plucked out from the songs and used to widen your musical knowledge.
This is a great book, and deserves a place on the shelf of any guitarist worth their salt.
Just don't expect to have it nailed by midnight...