Silence of the Song Trees by Branwen OShea

Description

When everyone he loves dies, he becomes the Ghost to save his planet.

Young Cerulean’s carefree life as a Firth is shattered when a planet-wide disaster wipes out all of his kind except him. The song trees that once harmonized to maintain the ecological balance of their shared planet Lenglood are silenced by the tragedy. Grief-stricken, Cerulean struggles to survive and awaken the dormant trees. But when human colonists show up, he has more to lose–the planet of Lenglood itself.