When this book first came out, many of us had a collective groan when we found out who was writing this one, the one and only Andy Boot.  He'd recently given us the brutal flaming turd called Strontium Swamp, which hands down has to be the worst DL out there period.
Andy does redeem himself with this one. After reading it and listening to the GA version, I have to say that he did a pretty decent job of this one.
The concept is certainly not new, but it does work well, and JB's repuation is put to the test, which does make it slightly more believable.
Yes there are crazy muties, but having them know some of the pre-dark history and the shrine to Nagasaki did make them slightly higher then your average slobbering sticky!
Hell, even the editing for the most part in this book was good! (Another reason why Strontium Swamp was so terribly bad).
Can I dare say this may be the best DL that Andy Boot as written? That might not be saying much, but hey if you are no longer writing for the series, why not go out with some decent work?