Tony Park 
The Prey [EPUB ebook] 

In Africa, men — and women — will risk all for the lure of gold
Deep underground in the Eureka mine, South Africa’s zama zamas illegally hunt for gold. King of this brutal underworld is Wellington Shumba, a man who rules his illegal miners through fear of torture and death.
Running Eureka’s legitimate operation is former recce-commando Cameron Mc Murtrie. When one of his engineers is taken hostage, Cameron does not hesitate to mastermind a dramatic rescue – and finish it off with a manhunt for Wellington. That is until corporate interference from the mine’s Australian head office, in the shape of ambitious high-flyer Kylie Hamilton, gets in his way.
Kylie is visiting South Africa supposedly to finalise a new mine on the border of the famed Kruger National Park, but instead she and Cameron are forced into a partnership to fend off an environmental war above ground, and a deadly battle with a ruthless killer below.
Cameron and Kylie have become Wellington’s prey. They must unite – their lives depend on it.