This is an excellent resource for the Doctor Who RPG as it offers a very well written description of a wholly new adversary "creature". The Ravens fit well into the setting and there's a lot of detailed information on how they can be used in a game in terms of motivations, personality and tactics. I would have liked to see a little more space, a page or two at least, given to adventure concepts as I think the author thoroughly covered everything he needed to in the first ten to twelve pages but the product doesn't suffer because of this.