The Black Coast by Mike Brooks

When the citizens of Black Keep see ships on the horizon, terror takes them, for they know who is coming: for generations, Black Keep has been raided by the fearsome clanspeople of Iwernia. Saddling their war dragons, the Naridans rush to defend their home only to discover that the clanspeople have not come to pillage at all. Driven from their own homeland by the rise of a daemonic despot who prophesies the end of the world, they have come in search of a new home. Meanwhile, the wider continent of Narida is lurching toward war… Read more.