'Not another book on positive thinking!' was my initial thought when my sister recommended me the book called 'The Secret'. Unlike all the other ones I've read though, Rhonda Byrne, the author, presents the same idea in a much more matter of fact and straightforward way.
In a nutshell, everything in the universe can be broken down to the level of energy. Here's an extract from the book:
'Remember that your thoughts are the primary cause of everything. So when you think a sustained thought it is immediately sent out into the Universe. That thought magnetically attaches itself to the like frequency, and then within seconds sends the reading of that frequency back to you through your feelings. Put another way, your feelings are communication back to you from the Universe, telling you what frequency you are currently on. Your feelings are your frequency feedback mechanism!'