'Throughout, the text is well written and the presentation is easy to follow … The content is presented in full formal rigour, as appropriate for such a book. The text is in the style of a monograph, referenced to scientific publications throughout and supported by a number of black-and-white figures. It can be recommended to readers on the level of advanced undergraduates and above, either to accompany a course in gravitational physics, or for other studies of gravitation in the frame of general relativity with a special focus on possible and actually performed tests, their experimental implementation, and their implications for theory.' Manuel Vogel, Contemporary Physics