At this point, Google has been rolling out major new features or improvements to NotebookLM almost every other week. Since the beginning of 2026, it has gained support for Gemini’s latest model, direct integration with the Gemini app, and, more recently, Cinematic Video Overviews. Now, Google is making NotebookLM even better for students by adding support for EPUB files as sources.
EPUB (Electronic Publication) is a commonly used open format for digital books. Compared to PDFs, it offers several advantages, such as a smaller file size, reflowable text that can adapt to different screen sizes and resolutions, and support for interactive elements.
If you have a digital library of books in EPUB format, you can now directly upload them to NotebookLM. Then, you can turn them into Video or Audio Overviews, generate Slide decks, or get an overview of their content — all in just a few taps.
Considering that NotebookLM is primarily meant for students and researchers, EPUB support will greatly benefit them. They can upload all their EPUB files to NotebookLM, creating a searchable knowledge base.
NotebookLM keeps improving, but there’s still work to do
While a small change, this removes a frustrating hurdle. Previously, anyone with an EPUB-based ebook library had to convert their books into PDFs before uploading them to NotebookLM. Native EPUB support removes this friction altogether.
As a student or researcher, if you juggle between multiple textbooks, research papers, and reference materials, you can now turn your entire ebook library into a powerful AI-powered knowledge base by uploading it into NotebookLM.
Despite a rapid pace of improvement, there’s still a lot missing from NotebookLM. If anything, Google should add support for folders for organizing notes and notebooks. Otherwise, things can quickly get messy, especially as the number of notebooks grows. It also lacks one-click export options, which should make sharing generated files easier.
Hopefully, Google gets around to adding these features sooner rather than later.
