SPACETIME TEAR : A book on wormhole or Einstein-Rosen Bridge

A wormhole is a special solution to the equations describing Einsteins theory of general relativity that connects two distant points in space or time via a tunnel. Ideally the length of this tunnel is shorter than the distance between those two points making the wormhole a kind of shortcut. Though they are a staple of science fiction and have captured the popular imagination wormholes are as far as we know only hypothetical. They are legitimate solutions to general relativity but scientists have never figured out a way to maintain a stable wormhole in the real universe. Find out more about them in this book by Amrit Pritam Sarangi