Hi!

As most of you probably know, the Adventure Log looks like a bookshelf with a growing number of books in it and the whole concept of adventuring and discovering things is in my opinion quite fun and feels rewarding. However, once you've completed a few books and you're looking for what challenge to tackle next you more often than not struggle to find which ones you've completed and which ones that are not.

Issue: In the "Adventure Log" bookshelf there is no way to tell if a book has been completed beyond manually scrolling through every single page in that particular book.

Suggestion: Once a book has been completed it should be marked so that the player can easily see that it's completed. For example, when you click on a shelf and see all the books then you could display the bookmark hanging outside for books that have been completed. If an entire shelf is completed then the bookshelf could show that shelf as being covered in cobwebs.

Side note:
A) The way to mark things were just examples. What is important is the player's ability to easily view if something has been completed or not without going through every single page in book after book.