I got this book looking for an SF thriller, I didn't expect something like this. I have read all five Omen books, and had put down the novelization for "Virus" just before starting on EH. I have read plenty of gory stuff and usually have no problem. However, this book was too frightening. Mr. McDonald did his job much too well and he can be rightfully proud of the result. I didn't sleep last night at all! I couldn't close my eyes without seeing the horror, the mayhem (the output of the ship's log kept playing on my frontal lobe), the perversions, and the face of the creature! Body parts flying around OK, but leave the eyes alone! I'm will NOT be watching this movie... The writing is excellent: tight, appropriately gloomy, with good physics, and I cared for the characters; but the developments are not for the faint of heart, the religiously superstitious, or for a midnight reading. How much of it was real, and how much tricks to force you onto suicide? The unholy one also behaves in mysterious ways. Where did the ship go in the end? I don't care, as long as it is far away from Earth. The sad thing is, no character gets away unscathed.