As a whole this book is good, it's a solid addition to the Admiral Morgan series. It's got a nice mix of politics, action and intelligence work. There's less undersea action than some of his other books but the story nonetheless does revolve around an Iranian purchased Soviet submarine.
The Iranians, or, "fucking towelheads" as they are referenced in the book, plan an attack which would destroy large parts of the eastern coast of the United States - it's nice to not have the same targets rehashed. However, there were some rather large holes in the plot; such as the rest of the world who would also be devastated to varying degrees not lifting a finger to help.
The edition I read, William Hienemann, 2004, 0434011959 had several editing errors which somewhat broke your immersion in the story such as dates listed as "9 October 9 2009" or one paragraph which had a characters name, "Adan", several times correct but once listed as "Adam". There were only a handful but still I would expect better from a mainstream publishers final edition.
Overall, an enjoyable tale if you can overlook the flaws.