Question: I'm struggling to write a book, can you suggest a tool that helps with plotting and chapter development?

If you're having trouble writing a book, Subtxt could be just the ticket. This narrative framework uses AI to help writers find gaps in their story and construct a narrative structure. It's got tools like Narrative Agents, Subtxt Muse, Premise Builder and Storyforms to construct rich narratives and explore rich thematic structures. With three pricing tiers, from $25/month to $250/month, Subtxt is for writers at all levels, helping them improve their work with professional-level analysis.

Another good option is Novelcrafter, an all-purpose novel writing tool. It's got a personal Wiki for storing story details, multiple writing modes and AI tools to help with outlining, editing and other tasks. The tool accommodates both planners and pantsers with customizable tags and labels, and you can try it with a 14-day free trial to see what's available.

If you like a clean interface and more advanced organization tools, LivingWriter is worth a look. It's got a drag-and-drop interface to organize chapters, an AI Outline Generator, smart text and auto-suggest tools. The app also can export in a variety of formats and integrates with Google Drive and Dropbox, so it's a good writing companion.

Last, Sudowrite is an AI writing assistant designed to help you overcome writer's block and guide you through the entire writing process. It's got tools for idea generation, outlining, writing, editing and more. With customizable dark modes and project organization tools, Sudowrite is designed to help you be more creative and productive, and it's a good tool for fiction authors.