The author definitely had a movie and bucks in his head when he wrote this book. The quality of the book plummeted as the result. It's just a description of movies that you've seen zillion times: enclosed space, monsters or obstacles coming one after the other, in the last moment the main character beats the monster (obstacle) to find the next one coming. NOTHING NEW unlike Jurassic Park. Value for your mind = 0. Not a great literature for sure, just a fast food to kill boredom.