It's pretty good, just don't expect a comedy like the first two. It's more seroius, though it's pretty good, IMO. Plus, you get to see Mindy Clark's tits, as well as one of the villains (the girl one) from "Superman II" (no, you don't see her tits)
Also, while it's a book, you should read Brian Keenes "The Rising" and "City of the Dead".