Behemoth follows on from Starfish and Maelstrom concluding this saga of a future world threatened by a bug from the deep oceans.
This is a more conventional adventure story than the first two books with heroes and villains and an epic final confrontation. Watts does keep us guessing for quite some time as to who is hero and who is villain however. This is facilitated by one of Watts major themes: the conflict between the greater good and personal sentiment.
The most powerful humans in Watts world are the Law breakers. Vastly powerful controllers who are subject to no law other than a genetically manipulated conscience. They will kill a thousand in order to save a million.
A bit confusing at times and the end when it does come feels a bit rushed. Nevertheless has to be recommended as the closing chapter of an excellent sci fi trilogy.