If you're a fan of cars and/or AC/DC, this is a cracker. As mentioned above, it's not an in-depth account of his life (or his band), just a random collection of motor related anecdotes.
If you ever meet Brian (which I'm lucky enough to have done), you'll know he is a very, very funny 'salt-of-the-earth' guy, with a suitably earthy sense of humour. The absence of any real chronology, combined with the fact that he manages to shoehorn a knob/sex gag into nearly every other sentence, makes you feel like he's cheerfully recounting these tales to you, pint-in-hand, propping up the bar next to you.