This Toolbox pick is one I genuinely did not expect to fall in love with: NotebookLM, Google’s research tool that can turn a stack of your own documents into a two-host podcast-style conversation about them. Google has also started using the name Gemini Notebook, but NotebookLM is still the name most people recognize.
“I uploaded the manuscript of my own book and had NotebookLM generate an audio overview of it, basically two AI hosts having a conversation about the ideas in it. Hearing my own writing talked through out loud, in a completely different voice than my own, is a strange and useful kind of feedback.”
That is genuinely how I use it, not the highlight reel.What it does
NotebookLM is a Google tool that answers from the sources you give it, including PDFs, Google Docs, web links, and audio files. Add your material and it can summarize it, answer questions grounded in those sources, and generate an Audio Overview: a podcast-style conversation between two AI hosts built from the content you uploaded.
I uploaded the manuscript of The Human Side of Leadership and had NotebookLM build an Audio Overview. Hearing two AI voices discuss the book’s ideas back and forth gave me a completely different way to hear my own arguments from the outside.
Why the audio overview matters
The feature that hooked me is not simply text-to-speech. NotebookLM turns your material into a conversational overview, with two hosts discussing themes, making connections, and explaining the source content in a more natural way than a basic summary.
It is not a replacement for careful reading when the details matter. It is a fast first pass at material you might otherwise never get around to reviewing.
How I have actually used it
Hearing my own book from the outside
The book example surprised me most. I wrote The Human Side of Leadership, and out of curiosity I uploaded the manuscript and asked NotebookLM to create an Audio Overview. Hearing two AI voices discuss the ideas was odd, but genuinely useful. It felt almost like listening to a first reader’s reaction to the book.
Finding themes across newsletter research
The more everyday use is research for AI, Eh? I can add a batch of articles or notes to a notebook and ask for a summary of the common themes before I sit down to write, rather than rereading every source from the beginning.
It does more than audio
Audio Overview is what drew me in, but NotebookLM can generate several other outputs from the same uploaded sources. These tools can help turn one collection of material into different formats for reading, presenting, studying, or organizing information.
I have only explored a few of these outputs myself, so I cannot give every feature the same hands-on verdict as Audio Overview. The audio feature is genuinely excellent, and the rest are worth exploring based on what you need from your material.
The honest caveat
Use the same judgment you would apply to any cloud-based AI tool. Stick to material you are comfortable having processed by Google.
Cost
The free plan is generous enough that many people may never need to upgrade. Paid access is also available through Google’s broader AI plans, with pricing beginning at roughly $11 CAD per month depending on the plan and current exchange rate. Pricing and included limits can change, so confirm the current Canadian price before subscribing.
Who it is for
NotebookLM is useful for anyone who needs to work through a collection of source material without losing the connection to the original documents. It is especially helpful for:
- People with reports, articles, notes, or PDFs they have been meaning to review.
- Students and lifelong learners who want study aids grounded in assigned material.
- Writers and researchers trying to identify patterns across multiple sources.
- Leaders who want a quick first-pass overview before reading important documents closely.
- Anyone who absorbs information better by listening than by scanning another long document.
Would I recommend it? Yes.
The free plan alone is generous enough for most people to see whether it fits their workflow. Audio Overview is the standout feature for me, and the source-grounded approach makes NotebookLM more useful than asking a general chatbot to guess what a document says.
Try it yourself
The free plan does not require a credit card, and you can create your first overview in about ten minutes.
- Go to notebooklm.google.com and sign in with a Google account.
- Create a new notebook and upload a document you would normally never get around to reading properly.
- Choose Audio Overview and let NotebookLM build the two-host conversation from your source.
- Listen on your next drive or walk, then notice what sticks that you may have missed while skimming.
Whatever AI produces, always read it, verify it, and make sure it accurately reflects the source. AI can help you process the material. Your judgment, context, and values remain the final layer.