Contrary to the blurb on the cover, this book isn't particularly Northern or Norse. Aswynn, who to be fair is honest about her approach and background, tackles the runes from the perspective of a Ceremonial Magician rather than a Germanic runeworker. If you are Wiccan or a ceremonial magician you will recognise a lot of the framework.
If you want a book purely on runes and germanic beliefs this isn't helpful. There is a lot of clutter from ceremonial magic, wicca and general psychology (Jung), occultism and New Age theories that have nothing to do with the Runes or Northern religion. Probably about a tenth (if that) of this book would be useful to you. By the time you've weeded out the dross you'll wonder why you bought it. Also, if you are capable of weeding out the dross, you obviously don't need this book in the first place because you know what you are doing.
It gets two stars because Aswynn tries to be honest about her approach and at least looked at the Rune Poems.