Based on the popular math-focused TikTok account that has garnered nearly 100 million views, Math Letters strives to share a different side of mathematics with a wide audience.

There is virtually no scientific endeavor that does not rely on mathematics in a fundamental way—from physics and engineering to economics and biology. Put simply, mathematics is the language of our universe, and those who are fortunate enough to pursue it often see the world around them in a new light. Its distinction as the “queen of the sciences” is well deserved.

Unfortunately, mathematics holds another distinction as the most difficult and anxiety-inducing subject in school. There is no doubt about it, math can be tough. Analytical thinking is a skill that rarely comes naturally. Couple this with the fact that most of the math we learn in school has little direct application to our daily lives, and it is no surprise that many people view the subject with a vague sense of apprehension.

But there is a different side of mathematics, one of profound beauty and mystery that revolves around patterns and abstract ideas. Many of the topics in this book would never be encountered unless you happen to hold an undergraduate degree in math.

Each topic is presented as a separate “letter” and is, for the most part, self-contained. There are no formal prerequisites beyond arithmetic and a curious mind. This book is suitable for a wide range of backgrounds, from high school students and their parents to business professionals, educators, and retirees.