This volume contains original material and fresh ideas from the world's leading specialists on a wide range of topics in general relativity, astrophysics and cosmology. The topics range from the localization of the gravitational field energy and gravitational waves, the physics of black holes and time machines, to the latest discoveries concerning black hole candidates and 'COSMOSOMAS' (imprints on the relic radiation).The volume serves as a guide to some trends of research in general relativity and cosmology and will be of great interest to the professional relativist as well as newcomers to the field.