Charmed Sphere — Catherine Asaro

What was the use of being a powerful mage if you couldn't learn the spells?

Once Chime had been the most promising mage in the land, feted and celebrated for her potential and future role in the kingdom. Then Iris, her young competitor, made a stunning leap in skill and turned Chime's world upside down.

Now no longer the most powerful, no longer promised to a prince -- and still unable to harness her magic properly -- Chime was set adrift. As was the new king's cousin -- and former heir -- Lord Muller. Yet when the neighboring kingdom threatened war, Muller and Chime were tasked with uncovering the plot. Both were flawed, yet unwilling to accept a lesser destiny than they had once known. Could this quest be the opportunity for redemption -- or would it lead them to their deaths?