The Science of Getting Rich is a very influential self-help book written by Wallace D. Wattles. The book was published in 1910 before other classics such as The Master Key System and Think and Grow Rich. Many of the ideas introduced in this book are still relevant today. The Science of Being Great is a self-help book written by Wallace D. Wattles in which he explains how our thoughts can dictate how great we can become. Wattles believed that visualizing what we wish to have happen is a key to success. Wallace D. Wattles was an American who became one of the most famous New Thought writers. Wattles wrote some of the most influential books in self-help literature including The Science of Getting Rich and The Science of Being Great.