William Walker Atkinson 
Practical Psychomancy and Crystal Gazing [EPUB ebook] 

New Thought" adherents at the turn of the 20th century vehemently believed they could tap into latent and mysterious mental powers, and one of the most influential thinkers of this early "New Age" philosophy offers here, in this delightfully weird 1908 work, a crash course in this benign and useful magic. You’ll discover. . how to see through solid objects; how to diagnose hidden disease ; how to peek into a person’s secret history ; how to travel by astral projection ; how to see into the past … and more. (Goodreads)