As a novel smack dab in the fantasy genre, supernatural is front and center in Eragon. You want elves? This book's got 'em. How about dwarves? Lots of dwarves here. Magic, dragons, evil monsters? Check, check, and check. One of the central journeys of the book (you could argue that is the central journey) is the transformation of Eragon himself from a regular old turnip farmer into a master of supernatural abilities. His world is entirely changed by supernatural forces and he must enter a whole new reality of magic and mysticism. Luckily, it's a ride that we as readers get to go on, too. Sweet deal.