Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Best in conjuction with a good theory book

Personally i thought this book was a great help to my occult studies, however, when i first got it, i didn't understand half of what it said. I ended up learning Kabbalah as well, because this is what the book is based on. It is not a book i recommend for beginners although if your are a beginner make sure you have a good book on the Kabbalah or even Aggrippa's "Three Books on Occult Philosophy" which has a good section on the planetary energies. But other than that, this book is invaluable to a magician seeking to pursue planetary magick.