According to the web site for The Secret, the book that inspired the movie's producer is called "The Science of Getting Rich" by Wallace Wattles.
I also thought the movie was choppy and disjointed, probably because there was a lot of editing done after the first version was released:
Jerry & Esther's Statement on "The Secret" - Washington-Baltimore Abraham Hicks Meetup Group (Washington, DC) - Meetup.com