Roberts does eventually springboard from farce into a broader commentary on society, power and corruption. But it just seems to me that, in overturning Larsson's own dark worldview and characters, Roberts ultimately ends up delivering a parody with less bite than the original.
I'm ambivalent as to whether this kind of book is fair game or simply trading on another author's success while snapping at the hand that feeds you.
But perhaps that's beside the point. As with many other books, this is all about the art of the literary mash-up itself and the intellectual exercise of melding two disparate stories into one under a clever and marketable title – regardless of whether it has much new to add.