Falling Kingdoms Series by Morgan Rhodes
In a land where magic has been forgotten and peace has reigned for centuries, unrest is simmering. Three kingdoms battle for power… A princess must journey into enemy territory in search of a magic long-thought extinct. A rebel becomes the leader of a bloody revolution. A Sorceress discovers the truth about the supernatural legacy she is destined to wield. It's the eve of war.
Falling Kingdoms is the eponymous first novel of the Falling Kingdoms Series. In the three kingdoms of Mytica, magic has long been forgotten. And while hard-won peace has reigned for centuries, a deadly unrest now simmers below the surface. As the rulers of each kingdom grapple for power, the lives of their subjects are brutally transformed Cleo, Jonas, Lucia, and Magnus are caught in a dizzying world of treacherous betrayals, shocking murders, secret alliances, and even unforeseen love. The only outcome that's certain is that kingdoms will fall. Who will emerge triumphant when all they know has collapsed?