Good point, "The Accidental Superpower" is wondrous in scope and ideas. The "Absent Superpower", the sequel, is OK; had some interesting insights about shale and the coming removal of the USA from the world. But the first book is timeless.
Increasingly, I wonder if the Absent Superpower is going to miss a lot of predictions due to the reduced importance of fossil fuels, which is the main driver of his narrative.
Zeihan is Pop Geopolitics, rendering the subject about as accessible and interesting as it could ever be to a wide audience but is as divergent from the real work as you would expect from pop- anything. Most obviously, Zeihan ignites the reader's imagination of apocalyptic futures without ever explicitly predicting or detailing them.
The future will far more likely turn out to be mundanely unpleasant rather than captivatingly apocalyptic. But that wouldn't keep the audience that Zeihan has on the edge of it's seat and so while many others in his field think that way, they're not garnering the same kind of views.
I find his stuff very engaging and there's a lot to be taken from it, but it should be taken with a skeptical mindset of 'what's the most boring way this might play out' to approach some kind of truth.