The discussion centers around a book that claims to provide an easy, non-mathematical approach to relativity. Participants express skepticism about this claim, noting that the book contains significant mathematical content, including calculus and derivatives, which may not align with the expectations of beginners. Some contributors mention that the book is more suitable for a college-level audience and suggest that while it can be a good introduction, readers should have a solid grasp of high school mathematics, including trigonometry and basic physics concepts. Recommendations for alternative resources include "Spacetime Physics," which emphasizes physics over math, and "Relativity Visualized," which offers a non-mathematical introduction. Overall, while the book may be accessible to those with some mathematical background, it is not as non-mathematical as advertised.