My teacher is doing a study on the Tayna so I was introduced through her about this writting. The introductions within the work are very helpful in grasping the extent of knowledge contained. This is not a read from "cover to cover" book, it is to be studied and taken at ones' own pace. Like most athentic Kabbalah books there are many layers of meaning that can be gained by rereading passages. The defintion of terms listed help in the understanding of concepts that are presented within the book.Buy it if you have the guts to grow.