<P>Containing the latest, groundbreaking discoveries in the field, this text outlines the basics of Einstein''s theory of gravity with a focus on its most important astrophysical consequences, including stellar structures, black holes and the physics of gravitational waves. Blending advanced topics - usually not found in introductory textbooks - with examples, pedagogical boxes, mathematical tools and practical applications of the theory, this textbook maximises learning opportunities and is ideal for master and graduate students in Physics and Astronomy.</P><P><BR><STRONG>Key features:</STRONG><BR>¿ Provides a self-contained and consistent treatment of the subject that does not require advanced previous knowledge of the field.<BR>¿ Explores the subject with a new focus on gravitational waves and astrophysical relativity, unlike current introductory textbooks.<BR>¿ Fully up-to-date, containing the latest developments and discoveries in the field.<BR></P>