To write good Dungeons and Dragons novels, you need to understand the game mechanics and rules to incorporate them seamlessly. Also, focus on creating vivid worlds and epic quests that keep readers on the edge of their seats. Add elements of magic, monsters, and heroic deeds for that classic D&D feel.
First off, think about what kind of adventure or story you want to tell within the Dungeons and Dragons framework. Research existing campaigns and settings for inspiration. Make your characters have distinct personalities and goals. And don't forget to sprinkle in some unexpected twists and turns to keep things exciting.