Books can be attributed to "Unknown" (no period) 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.
Sometimes I read my coffee table books in full, and let me tell ya, this one was hard to get through. No no, it's not so full of knowledge or fun facts or practical advise - it's the opposite.
I love and collect crystals and I have some general knowledge already. I felt like I didn't learn anything new, and if someone would mess up all the pages, I could mix and match them and you couldn't really tell the difference.
The information is like copy paste 10 cents per word assignment for some copy writer. Oh, and there are typing errors too.
Three stars, because the book is pretty. And, well, what do you know, it was probably meant to look pretty, sit beside a crystal altar and be looked through on rare occasions.