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The BOS usually starts out with a Title Page and may be called something as simple as, My Book of Shadows or something more creative like, My Triple Moon Book of Inspiration. You should include a Dedication page dedicating your work to whichever Goddess, and/or God you recognize, and a Blessing page where you put a simple blessing spell for your Book of Shadows and all the writings within.
It might be a good idea to include a line or two about your book being invisible to non-believers, or some type protection, that will prevent ill events from snoops.
I highly recommend a table of contents, or index section, as you will find it difficult to locate a needed piece of information later on, when your book is full. A section on your chosen path, or your personal philosophy is a good addition.
Your Book of Shadows will usually contain a list of all celebration rituals, especially the Sabats, which are the major turnings of the year. Also you will probably include all the esbats and moon phases of the year. You may want to include a section for celebrating births, deaths, handfastings (marriages), and even add rituals for blessing a new home, a business or a new job. With all these special events, there are correspondences that go with them, such as deities, gems and minerals, herbs, oils, colors, astrological symbols, and planetary influences. As with most celebrations there will be certain foods, decorations, ect.
Books You Might Enjoy:
Gerald Gardner - The Garnerian Book Of Shadows
Idres Shah - The Book Of Power
Sasha Fierce - The Book Of Shadows