When the luxury cruise-liner Emerald Dolphin - powered by a revolutionary new propulsion system - becomes a raging inferno and sinks mysteriously, it is lucky that NUMA special projects director Dirk Pitt is on hand to rescue the passengers and investigate the tragedy. Sifting through the undersea wreckage for signs of foul play, Pitt is unaware of powerful, dark forces playing their hand against him. Forced to fight for his life - and those of friends and colleagues - against ever more ruthless enemies from a shadowy organization, Pitt finds himself caught between the secrets of the past and the intrigues of the future. A future that will hold the world to ransom. Filled with breathtaking suspense and dazzling action, Valhalla Rising sees Clive Cussler at the height of his storytelling powers.