Bane & Bound (Empire of the Fallen #1)

Legend has it that Hellhounds are the gatekeepers of the Underworld.
Heralds of death sent to stalk those who have sold their souls to the Devil,
Beau Kavanaugh has been bound to fulfill a soul contract,
He has one last undertaking and he'll be returned to the living as promised,
But what happens when a century's old debt is not paid,
And a Hellhound finds himself trapped by a beauty,
Will his soul forever be chained to the Devil,
Or will he be forgiven?