I have read very few books by Australian authors so when I saw this recommended I thought I'd read it right away. The author is a former ambulance officer so there is a great deal of authenticity and detail in that part of the book.
The story of a murder - a violent one at that and all suspicions pointing out to the husband in this case. How through a series of deductions the eventual murderer is found is how the story works out. Add to this ambulance officers (a once in a lifetime incident by one who gets tempted by piles of drug money lying around!), the police, an aid group for displaced and vulnerable teenagers and you've got a good story going.