Gotta love when there’s something that helps make navigating and editing much easier! It sounds to me like you’ve found a wonderful format for your Book, Kayla- I’m glad to hear it’s working so well for you!
I also keep a digital BoS, but it’s just locally on my computer. I like the idea of being able to access your Book and notes from other devices (while still being able to keep it protected if you wish).
Thank you for sharing your recommendation! 
always