Brimming with danger and magic, this new fantasy adventure from acclaimed author MarcyKate Connolly will leave readers breathless as Aria discovers the strength of her courage--and the power of friendship.

Aria grew up in a castle, among the clouds with creatures of the air. She spends her days racing and soaring through the sky with her best friend, Gwyn, a young gryphling. At night, she falls asleep to the music of the Wind.

One day, the Wind vanishes, taking all Aria holds dear with it. Aria and Gwyn go on a desperate search, only to discover the Wind has been kidnapped by a sinister alchemist named Worton.

Nothing will keep Aria from rescuing the element who raised her-- not a riddle, not a quest, not a race against time. Except Worton can't be trusted, and the Wind is not the only one in grave danger...