Textbook in PDF format Einstein's general theory of relativity has transformed how we perceive space-time and its interplay with matter. This second edition presents a modern, compact and digestible account of modern cosmology and general relativity. With updated and expanded chapters, topics covered include equivalence principles, space-time curvature, Einstein’s theory, tests of GR, black hole theory, gravitational waves, the Cosmic Microwave Background (CMB), the large-scale structure of the Universe, and quantum gravity. Each chapter contains a set of exercises to consolidate the material and other challenges for students. Fully worked solutions are provided, accessible only by instructors. This comprehensive book caters for third and fourth year undergraduates reading for degrees in physics, astrophysics, and related degree programmes, and is useful as a reference for postgraduates