At Blade's Edge Goddess With A Blade Series, Book 4.

Rowan Summerwaite is no ordinary woman. Raised at the knee of The First and honed into a weapon by the Hunter Corporation, she wields her ancient knowledge in Blade to the Keep, the fourth book in the epic Goddess with a Blade urban fantasy series by New York Times bestselling author Lauren Dane. Though she'd hoped the deadly events in Venice would end the threat to The Treaty she is sworn to protect, Rowan found evidence of a grander co...