|What is a Book of Shadows? It is where witches keep all the information they have learned during their studies of witchcraft. There may be spells, charts, colors, moon phases, blessings, rites, etc. A BOS is a personal diary. The original should be a book made by you. An online BOS is good to share info with the world, but your personal BOS is your's alone. I have had the same 3-ring binder throughout my college years, so it has a special meaning to me. I have transformed it into my BOS. You may decorate your BOS or leave it simple. However you do it is up to you. The beauty of Paganism is the personal aspect. All that you do should come from your heart.