PDF Books

Metaphysics & Spirituality Books 
http://library.worldtracker.org/Metaphysics%20&%20Spirituality/

Theosophical Society books:
http://www.theosophical.ca/resources_online_books.shtml
http://www.weltordnung.ch/books/
http://blavatskyarchives.com/theosophypdfs/early_theosophical_publications_authors.htm
http://onlinebooks.library.upenn.edu/webbin/book/lookupname?key=Leadbeater%2C+C.+W.+%28Charles+Webster%29%2C+1854-1934

Vipassana Books:
http://www.vridhamma.org/Online-Books-and-Pamphlets
Osho Books:
http://www.oshorajneesh.com/
http://www.oshoworld.com/e-books/eng_discourses.asp
https://www.box.com/s/ccfa5515b4b984ac88bf/1/273413671#/s/ccfa5515b4b984ac88bf/1/273413671

Art of Living Knowledge Sheets:
http://www.artofliving.org/wisdom-knowledge-sheets

Isha Foundation
http://blog.ishafoundation.org/
http://www.ishafoundation.org/component/option,com_newscomponent/Itemid,885/langid,1/typeid,2/

Kriya Yoga
http://www.yoganiketan.net/library.html

Swami Rama Tirtha
http://www.ramatirtha.org/freebooks.htm

Hinduism Books
http://hinduebooks.blogspot.in/p/complete-index-of-free-ebooks.html

Other Books:
http://www.consciouslivingfoundation.org/ebooks-inspirational.htm#PDF Documents
http://www.scribd.com/estudantedavedanta/documents
http://www.shiningworld.com/top/index.php?option=com_content&view=article&id=46%3Asource-texts&catid=3&Itemid=7
http://www.sacred-texts.com/
http://www.obooko.com/obooko_mind/free_ebooks_mind_body_spirit_001.html
http://www.messagefrommasters.com/Ebooks/ebooks_download.htm
http://www.holybooks.com/
http://selfdefinition.org/sitemap.htm
https://sites.google.com/site/pssdhyanam/ebooks
http://www.bharatadesam.com/
http://www.anandamayi.org/books/booksh1.htm