It would be good if you could add pages you've read but might not necessarily want to add as a book you've read. For me, this is novellas or short fanfics that I wouldn't necessarily add to my account, but sometimes I get in a binge of fics and can't track any reading unless I read one that is either already uploaded, upload one for it myself (even if it's very short and I don't want to add to my book count for the year) or pick up another book.