Preliminary Aspects of Classical Physics -- A Simple Approach to Einstein's Special Relativity -- Introducing Einstein's General Relativity -- Testing Einstein’s General Relativity -- Gravitational Waves and Energy-Momentum -- The Universe According to Relativity -- Spacetime Diagrams for General Relativity -- The Motion of the Stars in the Galaxies -- The Motion of Galaxies in Galaxy Clusters -- Dark Energy -- Time Machines, the Multiverse and Other Fantasies.

This richly illustrated book is unique in bringing Einstein's relativity to a higher level for the non-specialist than has ever been attempted before, using nothing more than grade-school algebra. Bondi's approach with spacetime diagrams is simplified and expanded, clarifying the famous asymmetric aging-of-twins paradox. Einstein's theory of gravity, general relativity, is simplified for the reader using spacetime diagrams. The theory is applied to important topics in physics such as gravitational waves, gravitational collapse and black holes, time machines, the relationship to the quantum world, galactic motions and cosmology.