Wallace D. Wattles (1860-1911) was a pioneering author and key figure in the New Thought Movement of the early 20th century. Best known for his seminal work "The Science of Getting Rich" (1910), Wattles developed a philosophy cantered on the "Certain Way of Thinking" that emphasized the power of positive thought in achieving financial success. His writings laid the groundwork for many modern self-help and prosperity-focused books.

Wattles' approach uniquely applied metaphysical principles to practical matters of business and wealth creation. In addition to his most famous work, he authored companion volumes "The Science of Being Well" (1910) and "The Science of Being Great" (1911), forming a trilogy that addressed holistic personal development.

Despite his influential writings, Wattles led a modest life. He worked various jobs including farm labourer and grocer before dedicating himself to writing and lecturing. His ideas have had a lasting impact, inspiring later works such as Napoleon Hill's "Think and Grow Rich" and Rhonda Byrne's "The Secret."Wallace D. Wattles resided in Indiana, where he continued to write and teach his principles until his death in 1911. His enduring legacy is evident in the continued popularity and influence of his ideas in personal development and financial success literature.