Late in mentioning this one, particularly as I've been reading and re-reading it a couple of times now.
From the Blurb:
Murder, political intrigue, bent cops and the fate of a nation - a thriller set in the murky underworld of 1951 New Zealand.
A man overboard, a murder and a lot of loose ends ...
In Auckland 1951 the workers and the government are heading for bloody confrontation and the waterfront is the frontline. But this is a war with more than two sides and nothing is what it seems.
Into the secret world of rival union politics, dark political agendas and worldwide anti-communist hysteria steps Johnny Molloy, a private detective with secrets of his own.
Caitlin O'Carolan, a feisty young reporter, is following her own leads. Together they begin to uncover a conspiracy that goes to the heart of the Establishment - and which will threaten their own lives in the process.
Filled with memorable characters, including many colourful real-life figures from recent New Zealand history, Red Herring is the stunning debut from a vibrant new voice in New Zealand fiction.