Outcome: a source-grounded notebook you can question and revisit, plus an audio version if you’d rather listen.

1. Go to Gemini Notebook (formerly NotebookLM) and sign in.
2. Click “+” to create a new notebook.
3. Upload your sources, PDFs, docs, links, or pasted text (up to 50 sources per notebook).
4. Ask questions in the chat, every answer cites the exact source passage it came from.
5. Open the Studio panel to generate a summary, study guide, or Audio Overview from your sources.
6. Choose an Audio Overview format (Deep Dive, Brief, Critique, or Debate) if you’d rather listen than read.

Pro tip: Add a steering instruction before generating an Audio Overview, like “focus on the practical applications,” to shape what the hosts discuss.