I am reading the book Artemis Fowl : The Eternity Code and there are a lot of unbelievable characters and gadgets.
The most unbelievable part of the book is that there is a fairy race that lives far below ground. Another unbelievable part of the book is that the main character Artemis Fowl is only 13 and can be regarded as the smartest person on Earth. The fairy race much farther ahead in technology then our technology. Another unbelievable character is captain Holly Short who is a part of the LEP-Recon force that protects the fairy world and she can heal people with fairy magic. They have gadgets that allow them to mind wipe people who have seen a fairy and the ability to resist fire. They also have blaster like weapons and they also have the can access any computer database in the human world. They also have really fast shuttles and multiple chutes that allow them to go into the human world.
These are some of the unbelievable parts of Artemis Fowl : The Eternity Code.