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.’ 
Wallace Delois Wattles  was an American New Thought writer. He remains personally somewhat obscure, but his writing has been widely quoted and remains in print in the New Thought and self-help movements.
Wattles’ best known work is a 1910 book called
The Science of Getting Rich in which he explains how to become wealthy.