Sky of Swords:

The mightiest swordsmen in the relm, are bound by magic to defend their noble wards...to the death.The King's Blades The unloved child of the unscrupulous King Ambrose,Princess Malinda learned at an early age to fight for what was rightfully hers. Now, with the Kings abrupt death, civil war has become her grim destiny. Making her uncertain way through the blood labyrinth of schemesand betrayals, Malinda can trust none but the Blades of the Royal Guard. But the Blades themselves are in grave peril. And the young Queen faces the most crucialdecision of her life: a choice that will either redeem her kingdom from chaos...or bring ultimate destruction down upon it, her Blades, and herself.