First publication of the third book in Cornelia Funke's internationally bestselling Mirrorworld series

Jacob, Fox and Will are on the trail of the Dark Fairy, and this time their journey beyond the Mirrors takes them deep into the East - into the realm of Russian folklore, of Baba Yagas, Cossacks, spies, and a tsar who turns up to audiences in the company of a bear...But someone else is in control: one of the Alder Elves, Immortals at home on both sides of the Mirrors, has not forgotten the promise Jacob made him in a Bluebeard's labyrinth. He teaches the three of them more about himself and his kind than they ever wanted to know, as the worlds either side of the Mirrors begin to collide.