I wanted to like this book. It is about a part of World War II I have studied little. It is written from an overview perspective, so one should be able to get a good understanding of the theatre. But it was a disaster.
From simple factual errors (p. 88 the Mitchell bomber has only TWO engines), to a clear misunderstanding of military units (p. 146 where the 7th Division is described as having only 2 battalions - a full division has between 6 and 12 battalions plus various other formations), to maps that have none of the locations mentioned in the text they are accompanying, to inconsistency from one paragraph to the next (pp. 101-2 where 75 bombers become 93, unless it was really 108, just a few paragraphs later) Duffy is all over the place.
Unfortunately, he is no better with the people. He gives brief biographies of the players - leaders mostly but some common soldiers too - and they sound good, until they don't. One general is noted as having been commissioned in 1923 but only two pages later to have distinguished himself in World War One when he was but a teen, though no further mention is given.
To round it out, Duffy's descriptions of terrain are also challenged. In one chapter he tells how the Allies decide to build three large airfields in a place which, just two pages before, he has described as having rough mountains marching to within a hundred meters of a mangrove jungle lined shore. Doesn't sound like any place for a large flat airfield!
I'll continue to look for a good history of the Second World War in New Guinea. This is not it.
Me as a critic (be careful! the harshness will be well concealed!)