Google is preparing a new artifact type for NotebookLM that would generate a literature review matrix from a user's uploaded sources. Labeled "Lit Review" in its current pre-release form, a name that may shift before launch, it appears built to turn a stack of documents into a structured comparison grid rather than the prose reports the tool already produces. It is not yet available to anyone, and no timeline has surfaced.

The matrix format signals who Google is courting: students, academics, and anyone working closely with large bodies of text. A grid lining up themes, arguments, or methods across sources is a staple of formal research, and placing it inside NotebookLM's Studio panel would give that audience a one-click way to map a field. The structure carries beyond academia. Feed in a book or a full series, and it could, in principle, chart characters, plots, or motifs against one another. "A Song of Ice and Fire" is the kind of sprawling, multi-volume corpus that would put such a matrix through its paces.

That reading-focused angle aligns with a second thread of development: a Google Play Books bridge and a dedicated textbooks section among NotebookLM's source options. The app already accepts EPUB files, and a Play Books link would let rights-protected reading material flow into a grounded workflow without manual copying. The moves fit Google's recent direction, which moved NotebookLM to Gemini 3.5 this month alongside agentic research, code-running notebooks, and broader downloadable outputs, tightening the connective tissue between Google's reading, research, and Workspace surfaces.

Caveats apply. The tool's source-grounded summaries have historically slipped on citation accuracy, and a matrix is only as reliable as the mapping behind it. For now, it sits in development, its final form and arrival date both open.