In this one, DiMercurio Jumps The Shark. The notion is that there is a war between the Western powers and a future united Islamic state. The Islamics have bought what can only be described as a Japanese-made super-submarine. This is where the story Jumps The Shark. This submarine has a supercomputer that has actual consciousness, torpedoes that are wildly better than anything the US Navy has (each one carries the equivalent of a Cray Supercomputer to help it track US submarines), super cruise missiles, and an Islamic crew that appears to be better than any US Navy crew. Essentially, the US Navy appears to be using year-2000 hardware and technology while the Islamics, armed by the Japanese, have a seagoing Starship Enterprise. The results are as predictable as they are implausible. If you are looking for a technically accurate submarine novel akin to a Tom Clancy book, that is not what this is. Almost all of the technology in this novel is speculative and, dare I say it, unlikely.
OK, those are the negatives. The positives are that this is a pretty good story if you can get past the implausible technobabble. It kept me turning the pages, with a grimace here and there as the technobabble got increasingly worse. Not a bad yarn. RJB.