From the author of Fury, The Devil's Engine: Hellwalkers concludes an explosive trilogy about the secret battle for control of an all-powerful ancient machine which can grant you anything you wish for, in exchange for your soul. In the third and final book of Alexander Gordon Smith's Devil's Engine series, Marlow and Pan are in hell. Literally in hell. Faced with the awful truth of being trapped in the underworld for an eternity—of Pan being trapped—Marlow makes a final deal with the Devil, a deal to go home. But he should have known: there is no real escape from a fight with the ultimate enemy. And when all hell breaks loose, it will be a war to end all wars—with demonic creatures spilling into the streets, monsters emerging from the shadows. Only the Hellraisers stand in their way, and they're not sure this is a battle they can win. They have no powers, they have no weapons. But they have each other, and they have hope, and they know how to kick ass.

Marlow Green's a high school boy in New York who's always in trouble for vandalism and acting out, and who one day stumbles into the middle of a battle with a demon and learns about The Devil's engine--an ancient machine which can grant anything you wish for--in exchange for your soul.

When fourteen-year-old Alex is framed for murder, he becomes an inmate in the Furnace Penitentiary, where brutal inmates and sadistic guards reign, boys who disappear in the middle of the night sometimes return weirdly altered, and escape might just be possible.

From the creator of the Escape from Furnace series, a ferocious epic of supernatural terror, perfect for Stephen King fans Imagine if one day, without warning, the entire human race turns against you, if every person you know, every person you meet becomes a bloodthirsty, mindless savage . . . That's the horrifying reality for Cal, Brick, and Daisy. Friends, family, even moms and dads, are out to get them. Their world has the Fury. It will not rest until they are dead. In Alexander Gordon Smith's adrenaline-fueled saga, Cal and the others must uncover the truth about what is happening before it destroys them all. But survival comes at a cost. In their search for answers, what they discover will launch them into battle with an enemy of unimaginable power.

After a failed escape attempt from Furnace, Alex is trapped in solitary confinement, where the real nightmares live.

In Hellraisers, he made a demonic deal. Now, in this sequel, The Devil's Engine: Hellfighters, it’s time to pay the price. Thrown into a relentless war against the forces of darkness, fifteen-year-old Marlow Green and his squad of secret soldiers must fight for control of the Devil’s Engines—ancient, infernal machines that can make any wish come true, as long as you are willing to put your life on the line. But after a monstrous betrayal, Marlow, Pan and the other Hellraisers find themselves on the run from an enemy with horrific powers and limitless resources—an enemy that wants them dead at all costs. Failure doesn’t just mean a fate worse than death for Marlow, it means the total annihilation of the world. And when all looks lost and the stakes couldn’t be higher, just how far is he willing to go? In the second book of The Devil's Engine trilogy, Alexander Gordon Smith has written another of his signature thrilling, fast-paced Faustian horror story that turns the tables on the battle between good and evil.

Alex's second attempt to break out of Furnace Penetentiary has failed. This time his punishment will be much worse than before. Because in the hidden, bloodstained laboratories beneath the prison, he will be made into a monster. As the warden pumps something evil into his veins--a sinisterly dark nectar--Alex becomes what he most fears . . . a superhuman minion of Furnace. How can he escape when the darkness is inside him? How can he lead the way to freedom if he is lost to himself?