Airs of Night and Sea — Toby Bishop

Driven by insane jealousy, Duke William is determined to found his own flying school, where the valuable flying horses of Oc will learn to bond with well-born young men?instead of arrogant women. Now, Larkyn Hamley and her beloved Black Seraph must gather all of their allies from the air to the ground. For if they do not soar now, none will ever see the skies again.