Gone (novel series)
"Lies" is set long months after "Gone". The town is run by a council, headed by Astrid. Zil's anti-freak Human Crew have taken over a small section of Perdido Beach. Orsay, who has the mutant power to see people's dreams, claims she can see the dreams of the children's parents. She is dubbed "The Prophetess" and holds nightly rituals to give children messages from their families. Orsay is helped by the mysterious Nerezza, who urges Orsay to continue to use her power and tell children to "step-out" when they turn fifteen. A young girl, Jill, is beaten due to some people's knowledge of her powers (she can transfix people by song, a Siren) and falls into an empty grave. Sam discovers her and is told by Edilio that she was in the grave of Brittney, who died in "Hunger". Sam learns of Brittney's empty grave and of Orsay's rituals, but he does not tell Astrid this during the next council meeting. Astrid discovers this and she and Sam argue; they break up. Astrid tells the council to claim that Orsay is lying and leading them to suicide, as they believe "stepping-out" results in death . The townsfolk learn she has lied and lose faith in the council. It is revealed in a side note that the outside world is attempting to break the FAYZ barrier and that all the adults from inside the FAYZ are alive. Children who "step-out" at fifteen appear outside the barrier in the normal world. Meanwhile, on an island far out to sea, several children attempt to survive in the abandoned but well-stocked mansion of their adoptive celebrity parents. Caine, Diana and the remaining Coates academy students struggle to survive and resort to cannibalism. They hear of the island with the mansion and plan to steal boats from Perdido beach undetected, to go to the island to find food. Caine makes a plan with Zil who riles up a mob and sets fire to a large section of the town at night, creating a diversion and allowing Caine to reach the Marina undetected. Sam attempts to stop the "Human Crew" but fails. Sam and many others believe they have seen Drake, who is believed to be dead. Unsure how to proceed, Sam leaves Perdido Beach. Zil wished for chaos to ensue after the fire, but, instead, calm prevails. Astrid announces a set of laws and steps down, knowing she will no longer be trusted. Drake then appears and Zil uses the opportunity to cause anarchy, before panic ensues as most of the townsfolk flee to the highway and the beach. Dekka confronts Zil, and the Human Crew leader dies of his injuries upon being dropped from her anti-gravity field. Little Pete, who has been playing on his GameBoy (which has been out of batteries for months), is revealed to be controlling events in the FAYZ through the game, and it is hinted that Pete himself is the Gaiaphage, which was not killed in the last book. Nerezza eventually attempts to kill Pete but fails when Astrid intervenes. Nerezza is an avatar of the Gaiaphage, created by Pete, who manipulated Orsay. Mary, who is turning fifteen, intends to "step-out" and lead all the daycare children off a cliff, convinced that killing them will cause them to reappear alive outside the FAYZ. Dekka suspends gravity and rescues the children, but Mary "steps-out". In the chaos, Little Pete's GameBoy is broken. He screams, causing the energy barrier surrounding the area to disappear for a brief second. Astrid and many others see the normal world beyond, but Pete regains control and the barrier reappears. The Gaiaphage is revealed to have been attempting to use Brittney's immortality and Lana's healing powers to bring Drake back from the dead, sharing the same body as Brittney. Sam returns, fighting Drake long enough for him to turn into Brittney. Unable to kill her, Sam decides to lock Drake / Brittney away with Orc as their jailer, as he experiences no pain at being whipped by Drake. Caine, Diana and the two remaining Coates children reach the mansion island and meet the five children there. Throughout the book, many characters have fallen sick by a flu-like disease, foreshadowing events in "Plague."
Front Lines (novel)
Front Lines is a young adult historical novel by the American writer Michael Grant, who is most famous for his dystopian young adult fictional series The Gone Series. It is written from the viewpoint of three girls, Rio Richlin, Frangie Marr, and Rainy Schulterman. The series was originally titled "Soldier Girls".

Question: Who is the writer of the bestselling book series Gone  and "Soldier Girls"?
Answer: Michael Grant