My daughter's soul is trapped in Hell. I'm going to get her back.

Callie deserved heaven. Instead, she's somewhere in the pit, and every day she stays there is another day I fail her.

Wendell Knightsbridge holds the key to freeing her—but his price is insane. He wants me to descend into Hell, find Lucifer himself, and steal the Devil's power. Bring it back like a package delivery. Simple.

I'd laugh if my daughter's soul wasn't on the line.

So I'm going down. Into the fire. Into a realm of horrors that would break most minds just to witness. My team: a ghost with a death wish, my Hellicorn, and Hannah—who must become the demon Xaglath to guide us through the nightmare. Our path leads through the blackened wastelands of the damned, past creatures that feast on suffering, all the way to Pandemonium itself—Hell's capital, ruled by a Demon Lord who doesn't take kindly to visitors.

And somewhere along the way, I have to rescue a necromancer from the Hell Priests who've claimed him.

No backup. No extraction plan. Just the desperate hope that I can navigate the worst place in existence and make it back with my soul—and my sanity—intact.

If I survive this, Knightsbridge will answer for every moment of this nightmare.

But first, I have to walk through Hell.

For Callie, I'd walk through a thousand of them.

Harry Bosch meets John Constantine in this harrowing supernatural thriller that takes the battle beyond the mortal world and into the inferno itself.