Books can be attributed to "Unknown" when the author or editor (as applicable) is not known and cannot be discovered. If at all possible, list at least one actual author or editor for a book instead of using "Unknown".
Books whose authorship is purposefully withheld should be attributed instead to Anonymous.
I really enjoyed the sweet, romantic M/M version of Aladdin! The author does not go into too much sexual detail, which I believe is the right way to treat the fairy tale. The ending is a little unbelievable, but given that this is a fairy tale and the reader already has to suspend disbelief, I also found the ending very fitting!