The Echo of Broken Dreams — C.J. Archer

When a palace maid is attacked, Josie and the captain of the guards investigate together. Since one of the suspects is a foreign diplomat and magic expert, they use the opportunity to learn more about sorcery. But it soon becomes clear that he is using them to get to the truth about the palace and the servants' origins.

With unrest in the village, and servants growing impatient for answers, an undercurrent of danger pervades the air. But the most dangerous man of all may prove to be the king himself, because every clue points to him knowing more than he lets on.

As tensions both in and out of the glittering Glancian court rise, the heat between the captain and Josie is a distraction. But is it a welcome one?