Blue Pointed Star - Amber Wolf duology, #2

A new queen must save the Realm. But those who would deny her the crown are strong. Lish Taylor may have come to accept that she's the rightful Queen of Airlie, but when the Custodian of the throne accuses her of murder before she can make her claim, she is forced to retreat to a neighbouring court without her crown or title. Both the Realm and her home continent of Driarn are still dying, and Lish needs two things to stop their destruction: the authority of the crown, and the remaining pieces of the Blue Pointed Star. Underground assassin Aeyva Kaylneau is one step closer to fulfilling her lifelong dream of becoming a Sentinel.
But even as she helps forge Lish's path to the crown, Aeyva's past allegiances jeopardise everything she is fighting for and bring the Court of Airlie to its knees. Determined to form a powerful alliance to aid her ascension to the throne, Lish and her friends set out to arm themselves with valuable knowledge - knowledge another court will take in return for supporting an un-crowned Queen. But what they uncover is a much more sinister plan that will mean the downfall of not just the Realm, but the human world as well. As the human and Calahi worlds crumble around them, Lish and Aeyva must battle towering forces of magic and avarice to save both worlds - and the people they love.
But even as the pieces fall into place, the path ahead threatens to destroy all they hold dear.