I haven't read this work specifically. But generally, it might be about the end of Thomas Percy's story, perhaps in relation to the coal industry. Maybe it's a tale of his downfall or a significant change in his life connected to coal.
Perhaps a tragic end for Thomas Percy. Given the mention of coal, it could be related to the hardships of the coal - mining era, like poverty or danger.
It's a story collection related to Thomas and his friends. The coal aspect might refer to their work with transporting coal, which was an important part of their railway tasks. It surely contains a lot of adventures and lessons about friendship and cooperation among the trains.
Percy is surely one of the main characters since the book has 'Percy's Ghostly Trick' in its title. He is likely to be central to at least one of the stories.
Well, one interesting story could be about Percy's ghostly trick itself. Maybe Percy plays a spooky prank on the other engines, which makes for a fun and exciting tale.
One great fanfiction could be about Thomas and Percy's adventure in a new part of the island. Maybe they discover a hidden track that leads to a magical place full of talking animals and beautiful scenery. They have to work together to get back home and tell the other engines all about it.
Thomas is obviously one of the main characters. His friends like Percy, James, and Gordon are also likely to be main characters as they are usually important in Thomas and Friends stories.
One main theme could be friendship. Thomas and his friends rely on each other, which shows the importance of friendship in their world. Another might be trust, as the title mentions 'trust Thomas'. They trust each other to do their jobs and help out on the railway.
Well, 'Thomas Christmas Party' is likely a story full of holiday cheer. In the world of Thomas, his stories usually involve his friends on the railway. There could be fun adventures, like getting ready for the Christmas party, decorating the station, and sharing presents. The 'Other Thomas Stories' might include tales of Thomas helping out other engines, or perhaps getting into some small mischief on the tracks.