Heir of Ruin by Leigh Kelsey

A princess with untold power…

Maia Delakore is the tool of her aunt, the queen of the Vassal Empire. With her snaresong magic, Maia moulds the minds of the court, and eradicates any resistance to the queen’s reign. But when her aunt commands her to kill a prince, she refuses. And flees into the arms of the crown’s worst enemy—the Sapphire Knight.

A fae lord with a secret…

Azrail and his sister are all that’s left of a family framed for treason. As the Sapphire Knight, he and a small band of friends wreak havoc on the queen’s plans, sparing those sentenced to death, and sneaking the hunted beastkind—humans with an animal form—out of the city. But when they save a young girl with a rare, powerful magic, Azrail and his friends are drawn into a plot laid by the saints themselves.

A plot that will draw Azrail and Maia together, sparking a love that will become legend.