The Orphans' War — Teresa Hubley

The heirs to the throne of the elf kingdom Cuore, the twin princelings and their half-blood brother, are ready to prove themselves when war breaks out. Their tense family standoff, however, must subside for a perilous mission to the goblin country. Peace between them is the only hope for the half-blood's mortally wounded lady-love and the future of Cuore.