After a murder is committed, Will finds himself in possession of a key that has the potential to unlock the train's hidden treasures. Together with Maren, a gifted escape artist, and Mr Dorian, a circus ringmaster with amazing abilities, Will must save the Boundless before someone else winds up dead. With villains fast on his heels and strange creatures lurking outside the windows, the train hurtles across the country as Will flees for his life.His adventure may have begun without his knowing . . . but how it ends is now entirely up to Will.

Kenneth Oppel is one of Canada's finest storytellers. His books have captivated young readers all over the world, with many thrilling tales of adventure and imagination. His books create unique worlds only one step away from our own, drawing readers in with dramatic pace and astonishing invention. His ground-breaking Silverwing series has sold over a million copies worldwide, and several of his books have been the recipients of international awards - including Airborn, and its sequel Skybreaker, which was named the Children's Novel of the Year by The Times. He lives in Toronto with his wife and three children.