The Threshold

Some thresholds aren't crossed. They're survived.

Hellhound was built for the impossible - deniable missions, broken operators, and truths buried deep enough that no one should ever dig them up. But when a Cerberus aircraft goes dark on a routine exfil, Staff Sergeant Elijah Kane is pulled into a crisis that feels too familiar... and far too engineered.

The wreckage makes no sense.
The survivors make even less.
And the enemy Kane thought he understood is operating with a new kind of precision - one that traces back to a ghost from his past.

As Hellhound moves into the shadows to recover what should not exist, Kane uncovers a pattern of intelligence failures, erased identities, and a corridor of operations that someone has gone to extraordinary lengths to hide. Every answer leads to another set of locked doors. Every locked door points toward The Threshold - a place inside Cerberus no operator was ever meant to see.

Caught between loyalty, betrayal, and the scars he's carried since the mission that broke him, Kane will be forced to decide how much of himself he's willing to sacrifice to bring his people home.

Because in the dark world Hellhound inhabits,
the truth is never buried.
It's contained.
And containment always fails.

Perfect for readers of Jack Carr, Dalton Fury, Mark Greaney, and Andrews & Wilson, The Threshold delivers black-budget warfare, emotional depth, and relentless tension in the next chapter of The Hellhound Cycle.