17 readable articles give a thorough and self-contained overview of recent developments in relativistic gravity research. The subjects covered are: gravitational lensing, the general relativistic n-body problem, observable effects in the solar system, gravitational waves and their interferometric detection, very-long-baseline interferometry, international atomic time, lunar laser-ranging measurements, measurement of the gravito magnetic field of the Earth, fermion and boson stars and black holes with hair, rapidly rotating neutron stars, matter-wave interferometry, and the laboratory testing of Newton's law of gravity. Any scientist interest in experimentally or observationally oriented relativistic gravity will read the book with profit. in addition, it is suited as a complementary text for courses on general relativity and relativistic astrophysics.