No bugs to report, so some suggestions instead...
1. Hide Completed should populate down the tree. If I check the box at the Library level, then all the books and all the pages should also be checked. But then, I also have the option of going to the book or page level and unchecking the box.
2. I do not find the Library very intuitive. Other than the "Learning the Craft" branch, I am clicking all over the place trying to remember where I was in different quests. I think I would have an easier time finding the quests if they were first broken down by location, i.e. Eldevin City - Army Barracks, Cragmyst Woods...

