a full 35min long breakdown of 4D in this series is on my YouTube channel now #dimensions #3bodyproblem

This book series might just be the cleverest sci-fi I've ever read. It's the Remembrance of Earth's Past series by Lou Sation. The first book is the Three Body Problem, which has been made into a Netflix show. And the manipulation of dimensions plays a large role across the story. For example, there are bubbles of four-dimensional space lingering in their universe, which sometimes intersect with the 3D world. When they do, the characters can jump into the bubbles of 40, look back on our flat 3D world, like it's just a sheet of paper, and gain an advantage in battles. They can take a brain from a prisoner's head without leaving any evidence, or board another ship remotely, surprising that other crew. Some aliens in the book have also got the ability to fold up large, low-dimensional structures, like a 2D computer circuit to fit inside small, higher-dimensional objects, which is how they make an 11-dimensional, all-seeing proton. And by the third book, we see that the ability to alter the dimensionality of the universe might just be the most powerful weapon there is.