The Wiccan Book of Shadows is an essential part of every Wiccan's routine. In these books are contained spells, potions, observations, and progress reports as one trods the path of Wicca. In fact, you can even have one for each different part of your experience.
However, before you start categorizing your Books of Shadows, you need to get one. If you have preferences as to the design of your Book of Shadows, you're going to need someplace to find a selection of these books in blank form. Not every books store will have even one Wiccan Book Of Shadows, never mind a variety, in stock.
Finding Your Wiccan Book of Shadows
You'll need to find a place that understands the Wicca supply needs of the working Witch while being easy to access at the same time. You might try looking at online Wicca colleges to see if they have online stores associated with them. Such a store would be put together by knowledgeable Wiccans with a good idea of both the Craft and the appropriate products to have in stock.
Online Wicca shopping also has the obvious advantage of convenience. There's something to be said for being able to shop at any hour of the day from your own home. Make sure you find a store put together by Wiccans with a solid grasp of Wicca and Magic, and you'll be sure to be in good hands.