The last two books in this series have been traditional action thrillers in terms of structure. Perhaps boldly, Green decides to go in a slightly different direction for this one; it's not entirely successful, but one can only applaud him for the risk.
Eddie Drood is stripped of his usual allies for this one, as he is sent to join a group of the world's most prominent agents competing for a legendary spy's accumulated knowledge. Said spy assigns the group a series of mysteries to investigate, and these challenges form the bulk of the novel.
Because of this, the story comes off as less of a continuous tale, and more like a collection of short stories linked by theme and protagonists. While all of the mysteries are fairly different (everything from Loch Ness to Tunguska), the similar structure of each chapter leaves this installment feeling slightly more repetitive than the first two.
There are still many pluses; Green, as ever, is a master of pacy action and extreme violence, throwing huge beasts and pychic horrors into the mix. The main group is an enjoyable assortment as well, including CIA fox Honey and Eddie's erstwhile betrayer the Blue Fairy. After the last book gave us a Deathstalker cameo, this one works in a guest from Green's Nightside books, an addition that works well.
The plot takes plenty of twists and turns on the way to the conclusion, with backstabbing and turnabouts aplenty. The fact that the team are ultimately in competition for one prize adds an extra element of tension to proceedings as well.
On the whole, a brave attempt to do something a little different with the series, although now that the experiment's over, I hope that Eddie's next adventure is slightly more business as usual.