Deep Six. Clive Cussler. 2017.

For the President of the United States, crisis point is approaching fast. With his new Soviet initiative entering its most crucial phase, the president suddenly finds himself faced with a pollution disaster of potentially cataclysmic proportions. And then - incredibly - he vanishes. 

It’s left to troubleshooter Dirk Pitt to find the connection between these two shattering events. From icy Alaskan waters to a blazing inferno in the Mississippi Delta, he tracks down a conspiracy so fiendish and sophisticated that even the superpowers are helpless in its grip.