Dark Lord of Derkholm by Diana Wynne Jones

While all this is going on, the group of pilgrims is finding clues to the Dark Lord's weakness. A large-scale battle is staged and fought between the forces of good and the forces of evil. They experience many adventures starting with an easy attack by leathery-winged avians. Every group is to believe that their tour is unique, while actually they are the exact same thing. The people from his world are called pilgrims and they get to go on an adventure.

He does this by forcing everyone to play along in a world-wide game to take people from his world to a new world and experience a fantasy adventure. He uses this demon to enslave the entire world and remake it in a way to earn him money. Somehow he finds the world of these books and makes a deal with a demon. Chesney is a man who wants money and power from what can be assumed to be our world. The novel was based on Diana Wynne Jones' Tough Guide to Fantasy Land - an encyclopedia-style collection of all the cliches of fantasy writing. This time, however, it is told from the point of view of the Dark Lord, a pacifist who loves creating new living things and giving life, and his family. They overcome more and more dangerous obstacles, more or less in one piece, before reaching the Dark Lord and defeating him and destroying his evil empire.

They go on a adventure where they meet enemies who want to get in their way and a prophecy that determines their destiny. A group of travellers get pulled from our world into a fantastical world full of magic. This is a retelling of a story everyone has heard before.

Dark Lord of Derkholm by Diana Wynne Jones