Definitely a gripping read but (and i know this is trademark Koontz) i found it annoying having to spend so much time in the head of some retarded serial killer.
I mean, seriously am i really interested in some well developed cockamany philosophy of some weirdo?
Just tell the damn story, damn it!
If you want to read Koontz, read Watchers and Lightning. Period.
Still not satisfied? Ok, read Midnight and Dark Rivers of the Heart...