Recently, we've had a number of new personal books being uploaded to the Faithlife SDA group. I'm anticipating that relatively shortly, its going to be a challenge to organize and view these books. Therefore, we've created a user voice request to add organizing folders to the Personal Book Builder like the folder functionality with favorites (i.e. a SS Lesson folder etc.).
If you're interested in this functionality and have votes available, please vote here. If enough are interested in it, hopefully, it will get added to the Logos development roadmap.
http://logos.uservoice.com/forums/42823-logos-bible-software-6/suggestions/8934307-allow-grouping-of-personal-books-into-folders-sub