The Wind Singer (The Wind on Fire, Book 1)

The Wind Singer (The Wind on Fire, Book 1) by Nicholson, William. hardcover edition. ISBN: 9780786824946.

Kestrel Haths schoolroom rebellion against the stifling caste system of Aramanth leads to explosive consequences for her and her family: they are relegated to the citys lowest caste and are ostracized. With nothing left to lose, Kestrel and her twin brother, Bowman, do the unthinkable: they leave the city walls. Their only hope to rescue the rest of their family is to find the key to the wind singer, a now-defunct device in the citys center, which was once the course of happiness and harmony in Aramanth. But the key was given to an evil spirit-lord, the Morah, in exchange for the Morahs calling off its terrible army of Zars. Armed with desperate bravery, wits, and determination, Kestrel, Bowman, and a tagalong classmate set off to find the key. Along the way they meet allies and foes, but in order to succeed in their quest, they must face the most sinister force of all: the powerful Morah.