Jason says, "Crowley’s masterpiece. If you haven’t been exposed to Crowley before (outside of his image), you’ll be shocked at the clarity of his insight and wit, along with the range of his technical knowledge. Crowley’s system took the Golden Dawn material, added in Eastern mysticism and sex magick, and ratcheted the whole thing up to the tenth power. Don't get lost in Crowley's personality or often-disturbing biography—what's important is the techniques. Alongside this, you’ll likely want a copy of the equally important Gems From Equinox."
This second revised edition of Crowley's magnum opus features new, more legible typesetting, text corrections based on a previously unseen corrected proof, and the previously unpublished Liber Testis Testitudinis.The original Book of the Law was rescanned for this edition, using the latest technology, for the clearest facsimile possible. Edited, annotated, and introduced by Frater Hymenaeus Beta, XI.