Google is expanding its NotebookLM capabilities with an open-source alternative called open-notebook, which supports various document formats including links, PDFs, EPUB, Office documents, YouTube, audio, and podcasts. The new tool allows for multi-notebook management, enabling users to create separate notebooks for different projects. Additionally, the Gemini app is reportedly being updated to include features that allow users to convert PDFs into podcasts. This functionality is expected to enhance the user experience by integrating AI-driven note-taking with innovative content transformation options.