To me books brother.. Books are the greatest invention of all time.. I don't have to write an essay on books to make you understand its usage like a seventh grader I hope.. But to tell you one thing I have found which anyone wont tell is books helped me to cope with the the most depressing phase of my life.. I have found serenity in them.. They talk with you but don't ask anything in return.. Show me anything invented till now which have this much efficiency. If you can then I will take back what I said..