Widdershins: Covenant's End Ari Marmell2015

The thief Widdershins and her own "personal god," Olgun, return to their home city of Davillon after almost a year away. While Shins expects only to face the difficulty of making up with her friends, what she actually finds is far, far worse. Her nemesis, Lisette, has returned, and she is not alone. Lisette has made a dark pact with supernatural powers that have granted her abilities far greater than anything Widdershins and Olgun can match.
Together, Widdershins and Olgun will face enemies on both sides of the law, for Lisette's schemes have given her power in both Davillon's government and its underworld. For even a slim chance, Shins must call on both old friends--some of whom haven't yet forgiven her--and new allies.
Even with their help, Widdershins may be required to make the hardest sacrifice of her life, if she is to rid Davillon--and herself--of Lisette once and for all.

Titre original : Widdershins: Covenant's End (2015)