A Quest of Sea and Soil — S. Usher Evans

Spread to the corners of the world, Ayla, Ward, Cade, and Riona race against time to find the last pieces of the magical seod croí before Eoghan does. Freshly returned from the troll realm, Queen Ayla faces the mounting problems at the southern border. The Konevellians have stopped all shipments, and things are getting dire. She sends Ward to negotiate a peace deal - when he discovers the country seems primed to invade. Now the former farm boy-turned-captain must rally his troops to protect the kingdom from its greatest threat yet. In the fae realm, Riona struggles to keep the greater fae away from the newly-resettled trolls. The Erlking's edicts don't seem to be working as well as they used to, and her uncle Aldrick's power grows every day. The wizard Cade has ventured south in search of the stone, and meets a captain who hails from his long-lost people. He climbs aboard her ship, hoping to get a ride back home, but she's got secrets of her own. The third book in The Seod Croí Chronicles takes readers on a journey over land, air, and sea as the quartet face their greatest challenge yet--all the while, keeping a wary eye on the horizon for Eoghan's treachery.