A Book of Shadows is a personal journal or diary used by witches to record spells & their results, as well as jotting down notes & ideas. You can use any notebook you like or even the computer (just remember to back it up so you don't lose it!!) A typical Book of Shadows entry would include: the date, time & phase of the moon, the spell or ritual & its details, along with the ingredients used & a space to fill in the results of your spell later.