' ... written for final-year undergraduates mathematics or physics students ... This short, elegant book describes the major ideas of special and general relativity with unprecedented clarity and mathematical depth.' Physics Today 'Ludvigsen's book provides us with an elegant modern introduction to Einstein's general relativity; it is comprehensive, brief and very readable.' Professor Sir Roger Penrose, Mathematical Institute, University of Oxford ' ... a clear, clean, concise introduction to mathematical general relativity. It is a pleasure to see so many important topics discussed with such economy and care.' Professor Bernard F. Schutz, Max Planck Institute for Gravitational Physics, Potsdam 'The author has done a good work. The book is pedagogic and reads easily ... this book is recommended for undergraduate studies both in physics and in mathematics and also for faculty libraries ...'. A. F. Ranada, European Journal of Physics '... the book introduces many refreshing novelties to the subject ... Malcolm Ludvigsen's book is never dull and this is a major thing in its favour'. Graham S. Hall, General Relativity and Gravitation