This is definitely a young adult book, and the Glowworm and Raquel are deeply disturbing characters. There is a fair amount of human-on-human violence in this one, and while it isn't lengthy and graphic, there will be occasional scenes where the Glowworm decides to put a bit of his nemeses' flesh into a blender and through his feeding tube. Raquel's background and motivations aren't really explained, but she is brutal and senseless in her killing. This will appeal to some readers raised on crime shows and video games, but was less than appealing to me personally.
Readers who enjoyed David Gilman's The Devil's Breath, Muchamore's Cherub series or McNab's Traitor books will love the pulse-pounding action and adventure of this new paramilitary series featuring troubled but talented delinquents who have a shot at redemption.