Skyfarer

"It is called the Axiom Diamond: a mythical relic with the power to show its bearer any truth they desire. Men have sought for it across many continents for centuries, but in vain. Aimee de Laurent, apprentice portalmage, is thrown into the race to find the gem when her first portal-casting goes awry, sending Aimee, her mentor, and the skyship Elysium into the war-torn midst of the invaded kingdom of Port Providence. Against them is pitted the might of the infamous magic-wielding knights of the Eternal Order, and their enigmatic commander, Lord Azrael, seeking the diamond, and destroying all in their path."--Provided by publisher.