Arthur W. Upfield 
The Devil’s Steps [EPUB ebook] 

On special assignment with Military Intelligence, Detective-Inspector Bonaparte leaves his familiar Australian outback environment for Melbourne and a nearby mountain resort. Although out of his element with city people, Bony displays his characteristic skills to interpret some puzzling clues in the search for a wily killer…
The complex half-caste Bony is, I think, my favourite fictional detective of the past twenty years. — Anthony Boucher, The New York Times