It is called a grimoire, a book of shadows, a witch's Journal. The witches written book has many names and encompasses this valuable piece of magickal The witches book of shadows is an essential and most witches most valuable possession. When used correctly, some witches are open to sharing their Book of Shadows during coven ceremonies or a shared ritual. Some witches keep their grimoire very private and for a particular purpose, where are some witches have specific grimoires or Book of Shadows open to all. All witches then use their journals to document results and spell works and have one or a ton. Some are okay with having just one.