Rownie is the youngest in a hodgepodge household of stray children collected by Graba the witch. His older brother, Rowan, has vanished after performing in a secret play, and Rownie feels lost without him. Acting is illegal in the city of Zombay. No one may wear a mask and pretend to be someone else. Only goblins may legally perform, for they are the Changed—neither human nor other, belonging nowhere.  Rownie meets a traveling troupe of goblins who promise to teach him the secrets of mask-craft and entice him with the hope of finding Rowan. But Graba does not give up her own easily and hunts for them both. As Rownie searches for his brother, the true power of the masks--and those who wear them—is revealed. Are the goblins what they seem to be? What fateful magic lies hidden in the heart of Zombay? Mystery and adventure are woven through with charm and humor in this beguiling exploration of family, love, identity, and the power of words to shape what is real

Kaile lives in Zombay, an astonishing city where goblins walk the streets and witches work their charms and curses. Kaile wants to be a musician and is delighted when a goblin gives her a flute carved out of bone. But the flute’s single, mournful song has a dangerous consequence: it separates Kaile and her shadow. Anyone without a shadow is considered dead, and despite Kaile’s protests that she’s alive and breathing, her family forces her to leave so she can’t haunt their home. Kaile and her shadow soon learn that the troublesome flute is tied to a terrifying ghoul made from the bones of those who drowned in the Zombay River. With the ghoul chasing her and the river threatening to flood, Kaile has an important role to play in keeping Zombay safe. Will Kaile and her shadow be able to learn the right tune in time?