Originally published as a shorter novel that was formed only by the first part, Twilight Eyes is the story of a young man that is driven to a carnival that provides refuge against the real world. He is escaping from the justice, having murdered his uncle. But his uncle wasn't entirely human. In fact, he wasn't remotely human. And he was not the only one. Like him, there are thousands of human-diguised demons that are in pursuit of just one thing: the ruin of the human race. There is only one problem and that is that the young man is apparently the only person that can see beyond the human masks of those things. In the carnival he will find the solace he needs, but just temporarly. Soon, he has to fight that inhuman monsters and some that once were humans. And finally a terrible plan that will ensure the demise of mankind is revealed to the desperate young man, skillfully plotted by the "goblins", (as the main character refers to the monsters) leaving him no other option than to fight.

  

   Certainly, this novel was the most promising Koontz story. The first part implied a lot of poetical justice, using an almost bradburian theme. If he had limited to write only the first part, it would have been a great novel, full of menace and dark signs. But, he intended to expanse the story into a second part that was a terrible failure. We can clearly see the breach between the two parts. Not that natural gap between parts in a book, but as if he had resumed his writing years later. And of course, Koontz couldn't leave room for a little bit of humanity in his characters. He doesn't even allow them to redeem themselves, leaving them unpunished. The end of the first part is the first of the many disappointments to come. The main character is stuck in an interesting dilemma, between doing that terrible task or forgiving, but Koontz ruined it terribly by giving that first part an awfully corny end that made no sense at all. Then in the second part, it became another classic Koontz, where the two loving characters arm themselves to the teeth and they go hunting the bad guys. The regular Koontz reader knows perfectly how this story will end: the two lovers will live happily ever after, technically without a scratch from their crusade. The reader with a little bit of common sense knows where this book belongs: inside a good old-fashioned trash can.