'Derek Landy has been something of a publishing phenomenon.'
- Irish Post
'This is the game changer of the series.'
- Bookzone4boys
'5/5 (if I could give it more I would).'
- JJreadingblog
'Hugely enjoyable - a thrill-a-minute adventure.'
- Jonathan Stroud, author of the Bartimaeus Trilogy
'It's exciting, pacy, nicely handled and fun. I sincerely hope Landy revisits these characters.'
- Philip Ardagh, Guardian