Kilo Class is about a hypothetical situation where the Russians are manufacturing and attempting to deliver deisel submarines to the Chinese, and the highest military officials in America will have none of it. Post-9/11, I don't think the plot is as plausible as it would have been had I read this book when it was published. Neveretheless, it's an entertaining book.
The first chapter or two are somewhat deceptive. They are written in a very distinctly different style from the rest of the book, and the plot they outline only comes into play near the very end of the book (and then only weakly). This is unfortunate -- I actually preferred the scientists on a mission to the antarctic, and was hoping they'd discover something there. But I won't spoil the book for you.
I give the book a 6 out of 10 for its imaginative, but historically less-than-plausible plot. Read it if you find it, but I wouldn't work too hard on that.