I'd love to be able to sort my books in order to see which ones I forgot to add to challenges.

I know that I can go through my read books manually to see, but so far this year, that's 238 books and a lot of times that list is so long that the page won't load. The other option would be to load only 10 or 20 books at a time and then go to a new page if I haven't found it yet.