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.
Beautifully written book. It doesn't simply talks about neurobiological mechanisms - book explores the unfolding of our understanding, as a detective story, of how the visual cortex works, which in turn gives us a vision of how the brain works as a whole. I believe that many readers: scientists, philosophers and, not least, artists- will find food for thought in this immensely rich book.