I used FirstBook.ai to generate a full book blueprint in about 30 minutes—chapters, subtopics, and detailed text—all from a guided setup. I like it because it takes minimal effort to get a solid first draft, and you can download it as Google Docs, Word, or PDF to polish and format for publishing.
Pros
+Generates a full book blueprint fast (outline + detailed chapter content)
+Outline can be reviewed and edited before generating the full book
+Download options include Google Docs, Word, and PDF
+Tier 4 adds monthly book creation limits (more practical than one-time credits)
Cons
-Not publish-ready—you still need manual polishing, formatting, and visuals
-Lower tiers use one-time credits, so you hit limits quickly unless you upgrade
-Pricing/tiers can feel confusing if you don’t understand the credit system