Ordo Templi Orientis

William E. Heidrick Memorial Library

Physical Library

William E. Heidrick Memorial Library, the library of O.T.O. U.S.G.L., maintains a physical library which contains books, papers, and other materials of historical or technical interest. In 2025 we secured a dedicated space in Tacoma, Washington to house this library and other archive materials.

The library catalog is available here.

Arranging a visit

Members of O.T.O. in good standing of KRE and higher may visit the library by appointment with the librarian (librarian@oto-usa.org). Members not yet KRE will require special permission from the Grand Master to visit, write to the GSG (gsg@oto-usa.org) with requests.

Lending and Requests

We encourage and welcome requests from individuals whose research would be aided by access to the items in our collection. To request to borrow or get photographs of any items in our catalog, please write to the librarian.

Donations & Acquisitions

While our library has a small yearly budget for targetted acquisitions, most of the items in our collection have come from donations from individual members. If you would like to make a donation, please contact the librarian at librarian@oto-usa.org.
We welcome all books that are related to our areas of interest, in general our priority of acquisitions is as follows:

1. Crowley first editions published during his life, with preference towards association copies.

2. Crowley first editions published after his death.

3. Books about Thelema or the O.T.O., including books about Thelemites. Includes journal publications by local bodies.

4. Books that are helpful to the understanding of Crowley's writings, with a preference to those that he specifically referenced. Topics include, but are not limited to:

  • Freemasonry and other antecedent Orders such as The Golden Dawn
  • Kabbalah (both Traditional and Hermetic)
  • Tarot
  • Ancient Egypt
  • Yoga
  • Tantra
  • Occult
  • Religion
  • Writings by or regarding the Saints of the E.G.C.

7. Crowley later editions.

8. Books by members of the O.T.O. not related to the above.

9. General occult publications not covered above.

While the precise location of the library facility will not be announced publicly, we have established a P.O. Box for library-related shipments:

Ordo Templi Orientis U.S.A.
P.O. Box 102
Mountlake Terrace, WA 98043

Bequests

In addition to donations, we also welcome bequests. When an individual donates or leaves in their will a significant amount of books, we will create a "collection" under their name in our library.

When leaving books or other items to the Order, it is best to leave them to "Ordo Templi Orientis U.S.A." and to not attach any particular intended use. This allows us the most freedom in how we use and store them. For example:

Upon my death, I leave the following:
to Ordo Templi Orientis U.S.A. to be used as desired:
My entire library of books.
or
All my books designated as Thelemic or occult as determined by [designated person].
or
All my ritual equipment as listed in Schedule A. (list everything out on that page and update as needed)