Stormveil (Stormborn Chronicles #2) by Starr Z Davies:
 
A storm is coming.

Bast Blackblade, dangerous assassin, made a promise to Aslyn. A promise that grows harder to keep with each passing day as she thrusts herself headfirst into the dangers of the Imperial Court.

Aethan wants to get back to Aslyn, but first he has his own promise to keep... to find and save her father. But when an unexpected turn of events leaves him on the brink of death, Aethan prays he will live to see Aslyn again.

Stormveil is a dark yet noblebright fantasy with rich characters, dragons, spicy romance, and deadly games. It's the second installment of Starr Z. Davies' brand new fantasy world of Divica Stormborn Chronicles.