Books

If you love space science , astronomy , astrophysics ,theories on functioning of universe then I would recommend following books to read :

1. Hyperspace
    A Scientific Odyssey Through Parallel Universes, Time Warps, and the Tenth Dimension

    author : Michio Kaku
    Free download(PDF) : Hyperspace


2. Physics of the impossible
     A fascinating exploration of the science of the impossible---from death rays and force fields to invisibility cloaks---revealing to what extent such technologies might be achievable decades or millennium into the future.

     author : Michio Kaku
     Free download(PDF) : Physics of the impossible


3.The Elegant Universe:
   Superstrings, Hidden Dimensions,and the Quest for the Ultimate Theory

    author : Brian Greene
    Free download(PDF) : The elegant universe


4. Parallel worlds:
   a journey through creation, higher dimensions, and the future of the cosmos

    author : Michio Kaku
   Free download(PDF) : Parallel worlds


5. Beyond Einstein: 
    from big bang to black holes.

   prepared by : The structure and evolution of the universe Roadmap Team
   Free download(PDF) : Beyond Einstein