Zero believes that he is a hero, but the counting numbers think he is worthless until they get into trouble with some Roman numerals, and only Zero can help.
- ISBN10 1466808675
- ISBN13 9781466808676
- Publish Date 28 February 2012 (first published 1 January 2011)
- Publish Status Active
- Imprint Henry Holt & Company
- Format eBook
- Pages 40
- Language English