While suffering a bit from jargon overload, this is a very interesting book, both in terms of story and the unusual way it is told.
From the convential cover onwards, this book has a sense of fun disregard for convention.
Effectively its a multi-viewpoint 2nd person perspective story about a very near future murder investigation. While the story threads around hacking and compiracys, it stays original by intoduceing D&D and MMO aspexs to the story....effectively making it a story about real crimes done using virtual worlds. The technology depicted...mainly, augmented reality, is done in a realistic mannor and bang uptodate in terms of accuracy.
Aside from a few tiny additions near the end, this isnt scifi, its just pressent day tech refined and mass-marketed. What helps make it believable is it paints both the problems as well as the advantages of the tech. A particularly nice point is made about people growing up never knowing what its like to be lost.
The books entertainment value is also cemented well by good use of humour, even surrounding some critical moments. It never seems forced, and can be very funny.
So, overall, a wonderfull near-future detective story, let down slightly by over use of technical jargon.