Stormchild

The story of Tim Blackburn's search for his missing daughter, Nicole, who disappeared in the company of Caspar von Rellsteb, an environmental activist, who believes the only way to save the planet is through ruthless force. The author also wrote "Crackdown", "Wildtrack" and "Sea Lord".

audiobook can be found here - http://englishtips.org/1150840796-stormchild-by-bernard-cornwell.html