The Apocalypse Codex

An excellent entry in the series, which sees Howard heading to America on the trail of an evangelical preacher who also seems to be a cultist. There is, perhaps, a better mix here of the action, horror, and humour elements than was present in the third book (which veered rather more strongly towards the horror). Some new characters are introduced, and, in addition to the specific threat at the heart of the novel, it's also becoming clear that there's a larger plot arc through the series, as events in earlier volumes become tied together, and events are left somewhat open-ended.