Poseidon’s Arrow

This is an okay book co-written by Clive Cussler and Dirk Cussler. It is the greatest advance in American technology in decades – an attack submarine capable of incredible underwater speeds. Nothing else in any other nation’s naval arsenal even comes close. There is only one problem: a key element of the prototype is missing – and the man who developed it is dead. At the same time, ships have started vanishing mid-ocean, usually never to be found again, but when they are, sometimes bodies are found aboard burned to a crisp. What is going on?

This is the 22nd novel in the series.