As an expatriate Sandgroper, this narrative was quite entrancing. The authors have clearly spent much time traipsing through the vast areas of Western Australia. Arguably, they have seen more of it than many of its locals, who tend to be congegated in the Perth metropolitan area. Thus, somewhat ironically, a ready audience for this book might be people in Perth that wish to get out and see more of Australia's largest state.
Overseas visitors should be cautioned about the book. Even though it does give the size of WA, the sheer immensity and dearth of people may still be surprising. Twice the size of Alaska, and with scarcely 2 million people. Well over half of which are in Perth. The book strives to convey the feeling of desolation once you leave Perth, and you should do well to keep that in mind.