If you've never created your own Book of Shadows, now is a good time to start one. The BOS is where you keep all your important information -- rituals, workings, correspondences, etc. In some trads, there may be a coven Book of Shadows which is shared with initiates, but usually each individual members maintains their own BOS as well.
Because there are so many different branches of Wicca, and no central governing body, there's no one singular Book of Shadows. Be skeptical of anyone who claimes, "I have the ORIGINAL Super Secret Mystery Book of Shadows!!!" There's just no such animal.
A Book of Shadows is a great way to keep all your information at your fingertips. If you don't have one yet, you can put one together with a few basic supplies and a small investment of your time. It's worth it, if it means that you can find what you need later on without having to dig through piles of books.
It's not hard to stay organized once you get started. Remember to always cite your sources, so that if you need to backtrack later and find out where exactly you read something, you can find it easily. Even if your source is another person rather than a book or website, you can just include a footnote that says, "This section from Lady Ravenfire" or something similar. Keep in mind that your BOS is a magical tool, and should be treated accordingly.
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