William Walker Atkinson 
Thought-Culture [PDF ebook] 
Or Practical Mental Training

Though he typically wrote under the guise of anonymity, using an array of pseudonyms and pen names, author and thinker William Walker Atkinson was an enormously influential figure in the "New Thought" movement. In fact, he is often credited with being the original source of the ideas that later coalesced under the term "the Law of Attraction." The volume Thought-Culture offers an array of practical tips for those who are interested in improving their mental acuity.