just 2 questions

hide your book withing a book fingd a big book glue pages together then cut out a hole the shape of your BOS
then yer

I keep my BOS on my laptop. I am the only one that has my password anyways. If not, I would make the folder "hidden".

You could write in theban. its the witches language. Each symbol stands for a letter, but there difficult symbols to learn. You could just say you were feeling artsy lol. you can look up theban on google and such.

to the 1st question. get like an empty notebook and write in it. about hiding it... thats all up to you. i dont live with you so i dont no any special hiding spots. try under your mattress. thats a classic lol.