What good is a toy that will wind down? What if you could put a heart in one? A real heart. One that beat and beat and didn't stop. What couldn't you do if you could make a toy like that?
From the moment Mathias becomes the owner of a mysterious piece of paper, he is in terrible danger. Entangled in devious plots and pursued by the sinister Doctor Leiter and his devilish toys, Mathias finds himself on a quest to uncover a deadly secret.
- ISBN10 0552575003
- ISBN13 9780552575003
- Publish Date 26 October 2015 (first published 1 January 1998)
- Publish Status Out of Print
- Out of Print 10 August 2021
- Publish Country GB
- Publisher Penguin Random House Children's UK
- Imprint Corgi Childrens
- Format Paperback (B-Format (198x129 mm))
- Pages 368
- Language English