Hexed: The Harlot and the the Thief volume 1 by Michael Nelson and Dan Mora

Lucifer’s quest to steal and secure the dangerous magical artifacts of the world continues. While stealing a painting with an enchanted frame, she crosses a team employed by the mysterious and powerful Madam Cymbaline. She also tries to save a security guard from a more mundane problem—a heart attack—by trapping him in stasis in the painting. But “The Empty Garden” isn’t so empty and Lucifer accidentally releases Cymbaline’s brother, Yves. After that it’s a fight to survive between the siblings who are determined to kill each other, and kill her.
I absolutely love this series. It’s clever, mystical, but practical and the characters and artwork are fantastic. If you want something outside of the super man and barely dressed women of the genre, look here.