Rhapsody by Elizabeth Haydon

They are The Three spoken of in lore and myth.  Rhapsody is a Singer, one who speaks the truth through Naming a person or event's essential truth.  Achmed is the hidden one, an assassin who is destined to lead his people who have been considered monsters or half-men.  Grunthor is the giant who trains and leads the armies of Achmed and who is fiercely loyal to the others. 

Together they are to fulfill the prophecy of the Children of Blood, uniting all together, merging the civilizations that fled an Island kingdom only to unite in marriage with the Dragon civilization.  After a rupture in that union, all the various tribes of men have separated into their own realms and become deadly enemies of each other.  Now there is a chance of reunion.

This is the first novel in a nine novel series called The Children Of Blood.  Haydon has created an interesting world, filled with novel characters who have flaws to offset their virtues.  Rhapsody was a prostitute before she trained as a Singer.  Achmed was an assassin who served dark masters until he could break free while Grunthor cheerfully admits to cannibalism and murder.  The world frame laid down in this first novel will lead to more intrigue and depth in the eight following ones.  This book is recommended for readers of fantasy.