Namun, Nicholas Goodrick-Clarke menyangkal bahwa Hans Frank dan Rudolf Hess menjadi anggota Thule, namun para anggota utama Nazi lainnya hanya diundang untuk berbicara di pertemuan Thule atau secara keseluruhan tak berhubungan dengannya.[3][4] Menurut Johannes Hering, "Tak ada bukti bahwa Hitler pernah menghadiri Thule Society."[5]
Angebert, Jean-Michel. 1974. The Occult and the Third Reich: the mystical origins of Nazism and the search for the Holy Grail.. Macmillan Publishing. ISBN 0-02-502150-8.
Goodrick-Clarke, Nicholas. 1985. The Occult Roots of Nazism: The Ariosophists of Austria and Germany 1890-1935. Wellingborough, England: The Aquarian Press. ISBN 0-85030-402-4. Republished 1992 as The Occult Roots of Nazism: Secret Aryan Cults and Their Influence on Nazi Ideology: The Ariosophists of Austria and Germany, 1890–1935 (New York University Press, ISBN 0-8147-3060-4) and in 2003 as The Occult Roots of Nazism: Secret Aryan Cults and Their Influence on Nazi Ideology (Gardners Books, ISBN 1-86064-973-4).
Goodrick-Clarke, Nicholas. 2002. Black Sun: Aryan Cults, Esoteric Nazism and the Politics of Identity. New York University Press. ISBN 0-8147-3124-4. (Paperback 2003, 384 pages, ISBN 0-8147-3155-4.)
Höhne, Heinz. 1969. The Order of the Death's Head: The Story of Hitler's SS. Martin Secker & Warburg. ISBN 0-14-139012-3.
Jacob, Frank. 2010. Die Thule-Gesellschaft. Uni-edition. ISBN 3-942171-00-7
Jacob, Frank: Die Thule-Gesellschaft und die Kokuryûkai: Geheimgesellschaften im global-historischen Vergleich, Königshausen & Neumann, Würzburg, 2012, ISBN 978-3826049095
