The Dragon Sacrifice by Lynn Best

Three sexy dragon shifters. Princes trapped by a terrible curse. One woman sent to free them.
Seela knows there’s little chance she’ll be picked in the yearly Selection. As a fatherless village girl and apprentice healer, her name won’t be the one on the emissary’s lips.
Still, she can’t help but feel nervous. The women who are selected are never returned. No one knows what happens to them.
But on Selection day, Seela’s name is called. Taken away under guard, she finds herself shoved into a carriage, torn from her home. Worse, she’s thrown into a dark cave and sealed in. Then she hears skittering. Something horrible is coming.
To her surprise, she is rescued by the last thing she’s expecting–a dragon who can shift into a man. A prince to be exact. There are three very handsome, very sexy princes who all need Seela’s magic.
There’s only one problem. She doesn’t have any.
Seela learns of dark magic. And the princes who suffer from it. They think she is someone who can break the curse keeping these shifters bound. As she finds herself drawing closer to these men, time is ticking. Can they unlock the curse before it’s too late?