books.google.be - This is a comprehensive textbook for advanced undergraduates and beginning graduate students in physics or astrophysics, developing both the formalism and the physical ideas of special and general relativity in a logical and coherent way.The book is in two parts. Part one focuses on the special theory...http://books.google.be/books/about/Basic_Relativity.html?hl=nl&id=lfGE-wyJYIUC&utm_source=gb-gplus-shareBasic Relativity
