This is a fast moving adventure story. It's basically a constant chase with the heroes being pursued by relentless, resourceful enemies bent on eliminating them. Reilly owes a great debt to Michael Crichton whose Jurassic Park" was the clear inspiration for this story. It has very obvious plot similarities, similar characterisation and exhibits the same fears about the dangers of scientific discovery being misused, falling into the wrong hands and leading to chaos. Despite, or perhaps because of, these similarities this book is unputdownable. Yes it's improbable, even ludicrous but you won't think about that until you finish it. Escapism at its best!