General Relativity and Gravitation is devoted to all aspects of modern gravitational physics, and published under the auspices of the International Society on General Relativity and Gravitation. The journal presents letters, research papers, review articles and comments on all theoretical and experimental aspects of modern general relativity and gravitation and its extensions, plus book reviews, related mathematical topics, results and techniques. Coverage includes Extensions of general relativity; Numerical relativity; Astrophysical applications of relativistic gravity; Experimental gravitational physics, in particular experimental tests of general relativity: gravitational wave data analysis and phenomenology; Theoretical and observational cosmology ; quantum field theory in curved space-time; supergravity and gravitational aspects of string theory and its extensions; Quantum gravity and cosmology; and Teaching, public understanding, and history of general relativity and gravitation.