Phantom Wings Over the North by Desmond O'Connor

Twin teenagers Joan and Mark join their prospector uncle Paddy Quinlan and his mate Bluey Smith for a holiday in the outback looking forwards to some camping and propecting. But the group discover much more than just a few small nuggets when they come across a suspicious mobile laboratory run by Eastern Europeans. Are they really scouting for mineral deposits? Or are they somehow connected with those mysterious midnight aircraft flying in and out of the Pilbara?

ISBN: 9780994329455