The best protection spell is your own. There are plenty available in the spell tab. You can also pass your book through smoke as you say a prayer for protection, as well as adding a sigil or any other magical symbol that is good for you.
Re: B.O.S PROTECTION
By: Embers / Novice Jan 25, 2016
Post # 3
You could do spells like tracing and charging a bindrune or protective sigil on the cover. Several of my friends and I keep our books of shadows online using evernote or google docs. If you have a strong password and don't save it in your browser, then this could be a good way to keep your occult notes private and relatively safe from those who don't approve of magic.