Court of Fives by Kate Elliott
Published by Little, Brown, August 2015
Series: Court of Fives #1
Publisher's description: Jessamy’s life is a balance between acting like an upper-class Patron and dreaming of the freedom of the Commoners. But away from her family, she can be whomever she wants when she sneaks out to train for the Fives, an intricate, multilevel athletic competition that offers a chance for glory to the kingdom’s best competitors.
Then Jes meets Kalliarkos, and an improbable friendship between the two Fives competitors—one of mixed race and the other a Patron boy—causes heads to turn. When Kal’s powerful, scheming uncle tears Jes’s family apart, she’ll have to test her new friend’s loyalty and risk the vengeance of a royal clan to save her mother and sisters from certain death.