This book is a calculus text in the form of a fantasy novel. The story's characters solve problems and discover the principles of calculus, revealing the reasoning behind calculus. Covers all essential first-year calculus topics such as derivatives, integrals, trigonometric functions, natural logarithms, exponential functions, and an introduction to differential equations. Seventeen chapters conclude with exercises; the final chapter is includes appendices, a glossary, an index, and answers to the exercises.