Furnace Penitentiary: the world's most secure prison for young offenders, buried a mile beneath the earth's surface. Convicted of a murder he didn't commit, sentenced to life without parole, "new fish" Alex Sawyer knows he has two choices: find a way out, or resign himself to a death behind bars, in the darkness at the bottom of the world. Except in Furnace, death is the least of his worries. Soon Alex discovers that the prison is a place of pure evil, where inhuman creatures in gas masks stalk the corridors at night, where giants in black suits drag screaming inmates into the shadows,...

Alex Sawyer has escaped his underground nightmare to discover the whole world has become a prison, and Alfred Furnace is its master. Monsters rule the streets, leaving nothing but murder in their wake. Those who do not die become slaves to Furnace's reign of cruelty. Alex is a monster too. He is the only one who can stop Furnace but in doing so he could destroy everything. Is he the executed or the executioner? Who will die? All Alex knows is that one way or another, it all ends now.
Execution is an Escape from Furnace book from Alexander Gordon Smith.

When a sixteen-year-old troublemaker named Marlow Green is trapped in a surreal firefight against nightmarish creatures in the middle of his New York City neighborhood, he unwittingly finds himself amid a squad of secret soldiers dedicated to battling the legions of the devil himself. Powering this army of young misfits is an ancient machine from the darkest parts of history. Known as the devil's engine, it can make any wish come true-as long as you are willing to put your life on the line. Promised powers beyond belief, and facing monstrous apparitions straight out of the netherworld,...

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...