In the book, Zehr physically deconstructs Iron Man, analyzing how we could use modern-day technology to create a suit of armor similar to the one made by Tony Stark. The book makes a direct, parallel comparison of comic book science fiction with modern science. Zehr expresses that while science may be nearing a point where a suit like Iron Man’s could be made, it is important to consider limitations of the human body itself. Inventing Iron Man scientifically examines the brain-machine interface, bringing together concepts in neuroscience and neuroplasticity.