Google’s Gemini Notebook allows users to upload documents and then have Google’s AI digest those documents. Most important is that you can ask questions and the answers will come from those documents. If the source documents don’t have an answer for a question, the AI reports that. It does not look elsewhere for answers.
I have created a Lotus Sutra Study notebook in Gemini Notebook.
Here’s a list of the sources currently available:
Lotus Sutra Study Notebook Sources