Zyen by Ditter Kellen

Zyen, the biggest Bracadyte in history, has been conditioned since birth to hate the land walkers. They poison the sky, sea and land. And their greed knows no bounds. Zyen has sworn to kill every land walker before allowing them to destroy the Bracadyte way of life. Until he crosses paths with a tiny human named Carmen.Innocent and pure, Carmen melts his icy heart. He’ll do anything to protect her, even though he can never have her.
Carmen Mendoza lives her life in a constant state of anxiety. Plagued by panic attacks, she can’t seem to move beyond her horrific past and allow herself the one thing she desires most…the giant Arkadian, Zyen. When the human government discovers the healing power of the Bracadyte blood, Carmen and Zyen are thrown together in a deadly game of betrayal and greed that just might cost them their lives…