The whole Google Books Free Book section is FILLED with metaphysical knowledge!
I was searching on books for How to be Creative and came away with
How to help and heal one's self
by Charles Fremont Winbigler (Published 1916)
Creative involution
by Cora Lenore Williams (Published 1916)
http://books.google.com/ebooksFor my family with the E-Readers you've got whole libraries on that site!