From Artemis Fowl's journal: “As I expected, Foaly is still trying to follow me. I found a dozen spy devices on my computer alone. Well, as action movie heroes say, “two can play this game.” I was able to redirect the spyware, and now our inquisitive centaur sees on my computer only what I allow him to see, but I have full access to his database.

Looking through Foaly's files, I almost immediately I came across something interesting. It turns out that, in addition to the branches of the fairy people known to me - elves, gnomes, pixies, and so on - there is another, eighth branch. Demons. Until now, I have not had the opportunity to encounter them only because they left our world many years ago, and in a very unusual way: through a tunnel in time. It is also known that some demons sometimes end up on Earth. The place and time of materialization can be calculated. Only a brilliant mind can do this task, which means it’s worth a try...”