This book had some interesting information, but it suffered from a number of problems. Initially, it seemed to lack a real focus on its scope. Based on the title, the book should have focused on pagan magic. However, a significant emphasis was placed on customs and ceremonies that are directly tied to Christianity, either as Christian customs or as folklore tied to Christian conceptions of the Devil, demons, and witchcraft. I understand that many of these customs likely had some pagan basis that was later combined with Christian and Eastern magic, but the book does a very poor job of identifying the various strands. Instead, it often points to a folk practice that is explicitly Christian in nature and then moves on to discuss something different.
A separate issue with the scope comes from the regional focus. The book is supposed to be focused on the Northern tradition, but much of the magic discussed is related to Mediterranean practices. There is a significant amount of emphasis placed on magic in the Greek and Roman traditions, as well as some emphasis on customs from the near east. While it is interesting to see how these corresponded with northern traditions, often times the book elided any discussion of how the customs were linked; or, when the discussion was provided, the link often came down to Christian dissemination.
If the book had been titled "European Folk Magic" then it would have been far more accurate with regard to what the book actually was. As it stands, this is the second book I've read by this author where he cannot seem to focus on the topic he introduces. I'm not sure if that is because there are insufficient resources to illuminate the topic he's chosen or if he's just more interested in general occult practices. Either way be prepared to sift through a lot of chaff to find the useful kernels from a pagan perspective.