The Science of Getting Rich was written about 1911, on year before the author died.  This book is one of the earliest and best books on the power and abilities of the mind.  The movie "The Secret" came about after the movie's producer Rhonda Bourne (sp?) read this book.  Many present day, self-help, manifest your desires, authors use many of the ideas and concepts of Wallace Wattles.  Wallace Wattles at the age of thirty was so poor that he often could not provide food for his family.  For some reason he began to make observations of other people in his town and observed that not everyone was poor, some were very well off and that just hard work did not seem to be the reason why some people could accumulate wealth.  He began reading the philosophers of his day but also made an in depth study of what were the difference in the thinking patterns of the poor and wealthy.  This book is the result of that study.  The book is dated but the basic principles are still relevant today.  He laid the foundation for our current Law of Attraction authors.  An excellent read if read carefully.