Chaos and Crowns by S.C. Grayson

Odelle is used to proving herself, but fighting against the physical incarnation of evil for the fate of the world certainly raises the stakes.

When an ancient and magical crown surfaces in Chicago, Odelle joins forces with the Eteria, a secret society of immortal sorcerers from the Greek empire, to keep it from falling into the clutches of the evil Shadow. Odelle’s sister, Nora, has been fighting alongside the Eteria as a Warrior, but Odelle has avoided the sorcerers after one of their number hurt her pride by rejecting her romantic advances. However, Antony the Smith, the very sorcerer who spurned her despite his gentle disposition, is the one man she needs to locate the crown.
With the Shadow threatening the city she loves, Odelle is determined to prove that she can contribute to the fight despite her inability to use the magical Light. As she sets out to prove to Antony he was wrong to reject her, and to herself that she has a place in this magical new world, the hunt for the magical crown heats up. If she and Antony can’t set aside their need to prove themselves and work together, the Shadow will gain the power to engulf all they love.

Chaos and Crowns is set in the world of the Defenders of the Light series. It takes place after the events of Monsters in the Museum, and tells the story of Antony and Odelle’s romance.