This is a well done book, written by a mathematician. It gives a lot of great stories about how to improve our thinking about the world around us. My problem with the book is that most of the concepts taught and examples that are used are statistics. Ellenberg talks about p-values, regression, sampling, the Law of Large Numbers, probabilities with coin flipping and more. He even talks about Bayesian versus Frequentist ideas and the controversy between Neyman and Fisher, two famous statisticians. I can appreciate that statistics is based on mathematical concepts but if all your examples of mathematical concepts are statistics, Ellenberg is really making the case for why everybody should take a statistics class, not a mathematics class. Of course, the statistics class needs to be taught in a way to emphasize concepts and principles rather than calculation methods - as I write about here - https://cocreativelythinking.com/redesigning-the-traditional-statistics-class/.