Hereunder is a list of websites that contain thousands of online theosophical and related books and articles:

THEOSOPHICAL BOOKS ONLINE

Theosophical University Press: Classic books on theosophy

  - http://www.theosociety.org/pasadena/ts/tup-onl.htm

Canadian Theosophical Association: 

   -http://www.theosophical.ca/resources_online_books.shtml

   - http://www.theosophical.ca/resources_online_adyar.shtml

   - http://www.theosophical.ca/resources_online_otherdocuments.shtml

Blavatsky Collected Writings, 15 volumes

-       http://www.katinkahesselink.net/blavatsky/

Works of C. W. Leadbeater and Annie Besant

-       http://www.LeadbeaterAndBesant.org/

Theosophical Texts Online: the most comprehensive listing of theosophical materials online

-       http://www.austheos.org.au/clibrary/bindex-0.html

List of Books, Articles and Magazines Based on the Blavatsky tradition:

-       http://www.blavatskyarchives.com/intheblavatskytradition.htm

The best theosophical glossary ever compiled:

-       http://www.theosociety.org/pasadena/etgloss/etg-hp.htm

RESEARCH RESOURCES

Krishnamurti books online

-       http://www.jkrishnamurti.org/krishnamurti-teachings/books.php

Hard-to-find articles relevant to theosophy:

  -    http://www.blavatskyarchives.com/compitems2.htm

Letters of H. P. Blavatsky online

-       http://blavatskyarchives.com/blavatskyletters.htm

Online books on religion, esotericism and philosophy

-       http://www.sacred-texts.com/

Probably the best collection of Christian classic books

-       http://www.ccel.org/

A skeptic’s comprehensive annotation of the Bible

  - http://skepticsannotatedbible.com/