The Science of Getting Rich is a book written by the New Thought Movement writer Wallace D. Wattles and published in 1910 by the Elizabeth Towne Company. The book is still in print. According to USA Today, the text is "divided into 17 short, straight-to-the-point chapters that explain how to overcome mental barriers, and how creation, rather than competition, is the hidden key to wealth attraction."

Wattles, who had formerly been a Methodist, ran for office as a Socialist candidate in Indiana in 1916. He included the word science in the title, reflecting a secular approach to New Thought though also thereby borrowing from the then widespread popularity of Christian Science and its offshoots as he wrote about business prosperity, mind training, and success in the material world. The mental technique that he called "thinking in the Certain Way," was intended to establish a state of positivity and self-affirmation. According to Horowitz, mental healing and positive thinking theories for prosperity were joined by late 19th century trends such as Transcendentalism and a belief in the power of science and that "All these currents came together, and this philosophy that we call 'New Thought,' was born out of them. It's as American as an old-growth forest."