Aimed at readers with a mathematical background, this text offers an introduction to the general theory of relativity. The book is structured in four parts: Geometry, Electromagnetism and Special Relativity, Gravity and Curvature, and Solutions to Einstein's Equations. Each part is designed to build progressively on the previous ones, and attempts to combine mathematical rigor and physical insight. This text is suitable for advanced undergraduates, graduate students, and researchers who are looking for a well-rounded and rigorous exploration of general relativity. Whether used as a course textbook or for independent study, it provides a pathway into one of the most profound theories in physics.