Another great book in the Spooks series by Joseph Delaney. This is an additional book and not part of the main story, it is a catalogue describing all the creatures that John Gregory and his apprentice Tom Ward have to face during their adventures fighting the Dark. There are some great little bits of back story and it's all illustrated by the awesome Julek Heller. My only criticism of this book is that it should have been printed on better quality paper and maybe in a larger format to maximise the impact of the illustrations. I'd have given it 5 stars instead of 4.