StoryGenius is an automatic novel creation tool based on the GPT-4, Stable Diffusion API, and Anthropic API. It can generate an entire fantasy novel within minutes based on initial prompts and the number of chapters provided by users, and automatically package it into an e-book format. Not only that, it can also create an original cover based on the generated content and convert the entire work into PDF or e-book format at once. What's most important is that StoryGenius is open-source and can be used for free.