Nighthawk by Clive Cussler and Graham Brown

When a top-secret NASA spacecraft, the Nighthawk, mysteriously disappears while returning to Earth after a three-year mission, the race to recover it begins. But the craft isn’t just a technological marvel—it carries a deadly payload that could annihilate life on the planet. As rival powers close in on the wreckage, Kurt Austin and the NUMA team are thrust into a high-stakes pursuit across oceans and continents. From treacherous mountains to the depths of the sea, Austin must outwit enemies and uncover a conspiracy that could rewrite the fate of humanity.