The Secret (Rhonda Byrne)

The Secret was released as a film in March 2006, and later the same year as a book. The book is influenced by Wallace Wattles' 1910 book The Science of Getting Rich, which Byrne received from her daughter during a time of personal trauma in 2004.

The book has been translated into 50 languages and has sold over 20 million copies. Due partly to an appearance on The Oprah Winfrey Show, the book and film had grossed $300 million in sales by 2009. Byrne has subsequently released Secret merchandise and several related books.