Starcrossed — Elizabeth C. Bunce

In a glamorous castle full of Llyvraneth's elite, Celyn Contrare serves as a lady-in-waiting to shy young Merista Nemair. Her days are spent dressing in velvet, attending Lady Merista, navigating court gossip, and charming noblemen over lavish feasts.And at night, she picks locks, steals jewels, forges documents, and collects secrets. Because Celyn isn't really a lady-in-waiting; she's not even really Celyn Contrare. She's Digger, a sneak-thief on the run from the king's Inquisition, desperate to escape its cruel instruments and hatred of magic. If she's discovered, it will mean her certain death.But life as a lady-in-waiting isn't safe either. The devious Lord Daul knows her secret, and he's blackmailing her to serve as his personal spy in the castle. What she discovers-about Daul, about the Nemair, even about her own Lady Merista -- could signal civil war in Llyvraneth. And for a thief trained never to get involved, taking sides could be the most dangerous job yet.