The War Must End (The Guardian Series, #4)

The four realms were once unified until they couldn't agree on which element was the best of the four and the war began. Too many lives have been lost. Too many orphans couldn't stand it anymore. Four half elf half nymph maidens join forces with five dragons, a healer, a prince, and a child centaur. None are sure they will live as push themselves to see the end of the war.