The warrior queen (#4) : Hundredth Queen
(Book)

"In the final volume of The Hundredth Queen Series, Kalinda will risk everything to save the man she loves. Kalinda has brought peace to the Tarachand Empire, at least for now. Bhutas no longer need to hide their gifts. The last of the rebels have been banished. And Prince Ashwin is set to take over as rajah. But for Kalinda, this all came at a great loss. Her childhood home. Her best friend. The love of her life. Deven is still trapped in the Void, although he is able to find his way to Kalinda each night. He has been lucky so far--mortals are not meant to last in the Void for long, and Deven has lasted longer than most. But when he doesn't visit her one night, Kalinda knows that his luck has run out. She will do whatever it takes to save the man she loves, even if it means convincing a god to guide her through the Void. Freeing a mortal from the Void is nearly impossible, but Kalinda has never let those odds stop her before..."--provided by publisher.