This (and "The Breach") is like the top 5% best books Koontz ever wrote.
I don't know how else to describe it. It's not exceptionally "literary" or anything, but it's like a *really great* sci-fi/action movie, with a solid cast, Ron Howard on production, etc. And it lasts hours and hours, but at your leisure, because it's a book!
It's just incredibly entertaining. Patrick Lee really is a great writer in his own way.
My mom hasn't read a book in over 40 years, and she recently found herself unable to afford TV and was complaining about being bored. I thought "You need to read a book!" She was skeptical. (I guess she thought reading books is totally unlike riding a bike? I dunno...) Out of all the books I own, this (well, actually part one, "The Breach"... but I get the sense that they were written more or less together as part of one story) is one of two I sent her home with to try. I like it THAT much, and think it has THAT much universal appeal. Reading it really is like watching a fantastic movie.