Raw Magic introduces us to a new Thaumaturgy Path called the Flow of Power. This path is focused on manipulating other forms of magic... such as the magic of Mages or Mummies. In addition to the Path there are numerous Rituals included in this book, that focus on protecting or sensing magic of other types.
The Tabletop Gaming Club used this product in their campaign and found the path and ritual quite balanced. If you are running a campaign with Mages, Sorcerers and other magic users in it, the material in this book could be quite useful. We strongly recommend the book especially at its low cost.