The Book That Answers Back
by BrainStream CEO Steve Alcorn
Ask a room of students what Shazam actually does. Most of them use it every week. Almost none of them know.
Last week Andrej Karpathy wrote a short post about how we’re all about to spend a lot more time trying to understand what our machines tell us. He ranked the formats. Careful writing works. Diagrams work better. Interactive web pages beat diagrams. And at the top of his ladder, the one he says he’s most bullish about: a fully custom explainer video, generated on any topic you can name.
A few days later a builder named Tibo took that literally. He typed four words: explain how Shazam works. The model went away and built him a video. Constellations of audio peaks, the fingerprint match, the whole trick of it, narrated like a nature documentary. He posted it with the sentence I can’t stop thinking about: custom explainer videos will change education.
It’s the genuine article. Watch it.
"explain how Shazam works" I had no idea Karpathy is so right about this custom explainer videos will change education
— Tibo (@tibo_maker) October 2, 2026
I’ve taught writing most of my life, and I’ve written a shelf of books. Here’s the part nobody tells you: the author is the last person to learn where a book loses people. The questions arrive years later, by email, one at a time, always the same forty or fifty of them. The book never hears any of it.
Paper has no memory.
That’s what we’ve been building at BrainStream. When a reader asks a question inside one of our books, the book answers. Not with another paragraph of text. With a short explainer built for that exact confusion, sitting on the page right where the question was asked. Narrated, if the author likes, in the author’s own voice. (Mine is cloned. Hearing yourself narrate your own footnotes is an out-of-body experience.)
The first reader to get stuck asks. Every reader after that finds the video already waiting. A book that gets thicker exactly where people stumble, and nowhere else.
Somewhere tonight a student is stuck on chapter three at eleven at night. In the old world, that’s an email I answer tomorrow.
The book should answer. Now it can.
#AI #Education
