This is a military thriller based on an invasion of Australia by Indonesia. In what is a fairly standard format, the author follows the stories of several different groups - some military, some civilian. In this format, the reader really doesn't know any more than the characters do - there is no look at the big picture, except for a couple of lines at the start of each chapter.
This does keep the suspense level up, and the characters are generally well-written. The story flows nicely, but I did find the lack of the overall story irritating. A level of suspension of disbelief is usually required for these types of stories, in this case, for me, it was a little more suspension that I was happy with. I accept that the Indonesian military is numerically superior to the Australian forces, but the RAAF and the RAN have more modern equipment, and would certainly have an advantage in electronic warfare. I found the comprehensive victory of the Indonesian air and naval forces to be unlikely. Also, as is being shown currently in Ukraine, capturing cities without overwhelming numerical superiority, is pretty difficult, so it seems unlikely that Indonesia has a big enough military to capture all Australia's big cities, as well as make the incursions they do into Australia's vast land. Also, the complete lack of any reason why Indonesia invades is also irritating - I'm sure Indonesia would like the extra space and resources, but their military leadership would be well aware of the disparity in technological capability, and that they certainly don't have enough numbers to occupy a country the size of Australia. Also, they would have expected that the Americans would have got involved from the start.
Overall, it was a fun read, but I found the underlying assumptions troubling. 3 1/2 stars.