The next two books in The Phoenix Files series, Mutation and Underground, come together in this compelling race to the end of the world. Things are getting bad in Phoenix. Luke's dad is trapped on the outside and cut off from all contact. Jordan is having frightening visions of things that haven't happened yet. And Peter is slowly losing his grip on reality – and his temper. But the worst is yet to come. All three are being tracked by an enemy who could paralyse them at any moment. And deep under Phoenix, they will uncover a secret that changes everything. THE CLOCK IS STILL TICKING.