Download or read book What Is Relativity? written by Jeffrey Bennett and published by Columbia University Press. This book was released on 2014-02-25 with total page 204 pages. Available in PDF, EPUB and Kindle. Book excerpt: An astrophysicist offers an entertaining introduction to Einstein's theories, explaining how well they have held up to rigorous testing over the years, and even describing the amazing phenomena readers would actually experience if they took a trip through a black hole.