Google NotebookLM Adds Native ePub Support

Google recently added native ePub support to NotebookLM, enabling users to drag-and-drop eBook files directly into private notebooks. The update supports up to 50 sources per notebook and enables cross-source queries, chapter-precise citations, mind maps, and slide/audio summaries for large series such as a 4.4-million-word saga. Readers can now avoid spoilers and streamline narrative tracking without PDF conversions.
Scoring Rationale
Practical product update delivering immediate reading workflow benefits, but limited novelty beyond format ingestion and UX improvements.
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