Black Dog - Hellhound Chronicles

From the mind of Caitlin Kittredge, the award-winning author of the Iron Codex trilogy and Vertigo comic Coffin Hill, comes Black Dog, the first book in a new urban fantasy series about revenge and hell...it's Kill Bill with demons! Ava has spent the last hundred years as a hellhound, the indentured servant of a reaper who hunts errant souls and sends them to Hell. When a human necromancer convinces her to steal her reaper's scythe, Ava incurs the wrath of the demon Lilith, her reaper's boss.
As punishment for her transgression, Lilith orders Ava to track down the last soul in her reaper's ledger .