Download or read book Relativity Simply Explained written by Martin Gardner and published by Courier Corporation. This book was released on 2012-12-19 with total page 192 pages. Available in PDF, EPUB and Kindle. Book excerpt: One of the subject's clearest, most entertaining introductions offers lucid explanations of special and general theories of relativity, gravity, and spacetime, models of the universe, and more. 100 illustrations.