The striking thing about the Book of Shadows is that it is copied by hand in a century that could print anything. In Gardnerian and Alexandrian practice the initiate writes out the initiator's book, and the writing is treated as part of the training rather than as a way of getting hold of the text. Copying is slow, it forces attention on every line, and it produces a book in the copyist's own hand that belongs to that person and to that lineage.
Two consequences follow. The first is that no two books are identical: transcription errors, deliberate additions and a coven's own practice all accumulate, so the corpus behaves like a medieval manuscript tradition, with families of copies rather than a single authoritative text. The second is that the book is inseparable from the relationship that produced it. It is not a manual that works on its own, and it is not intended to. The contents of the initiatory books are oath bound. That restriction is held by the initiatory lineages themselves rather than by a publisher, and it is recorded here as a live custodial claim rather than as a historical curiosity. What can be described without breaching it is the shape of the practice, which is what this entry does.