The Demon Club / Scott Mariani.

"Life is good for ex-SAS soldier and rescue specialist Ben Hope. He's found love, peace and happiness at last... That is, until a man he's never seen before sits beside him on a plane, and makes him a proposal that turns his whole world upside down. Now Ben must embark on a deadly mission to eliminate a former SAS comrade, the enigmatic, elusive and highly capable Jaden Wolf. If Ben fails, the people he cares about will die as punishment. In a high-speed chase across Europe, Ben gradually learns the terrifying and disturbing truth about the men who have ensnared him in their clutches. A dark Satanic cult exists within the halls of power, and the only way for Ben to save himself and his loved ones is to declare war on the forces of evil. But who will win?"--Publisher.