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.
This book contains 4 chapters about different types of wizards. Chapter 1 introduces the concept of wizards and the next 3 chapters are about the magical tales about three different wizards. I enjoyed 'The Mean Man' and 'The Man With a Lump on His Nose.' Funny and enjoyable short stories.