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 liked reading the Bible in this daily format. There was a bit from the Old Testament, the New Testament, Psalms and Proverbs each day. It made it more manageable for me to be able to commit to finishing it. What seemed to me to be a formidable task at the beginning of the year became something I looked forward to each day.
Took me a year... well worth it to read the entire Bible, not just the sound bites, and absorb the context. Some books are very challenging and surprising, some a little dull, mired in their time frame. Others are sublime and so relevant to today.