In the explosive follow-up to The Catalyst, Rose Elmsworth faces a looming war as the world crumbles around her and shocking secrets come to light.

• ISBN: 9780763689735
• Published: 2017 , Candlewick
• Themes: action and adventure, Futuristic, Monsters, Survival
• Descriptors: England (UK), Fantasy, Young Adult (ages 14-18)
• No. of pages: 464