You can find the full text of "The Tree of Life: A Study in Magic" online at The Luminist or purchase a copy from Amazon .
Israel Regardie's " The Tree of Life: A Study in Magic " (1932) is a seminal non-fiction guide to Western ceremonial magic and Qabalah, outlining the practical techniques and philosophy of the Hermetic Order of the Golden Dawn. The work provides comprehensive instructions on topics like invocation, ritual tools, and the Sephiroth, acting as a foundational text for understanding magical theory and practice.
The Tree of Life: An Illustrated Study in Magic - Amazon.com