Amazing boy detective Piet Potter races against time to save a public event from ruin, although he has only a series of mysterious phone calls as clues.
- ISBN10 0070510237
- ISBN13 9780070510234
- Publish Date 1 January 1981
- Publish Status Out of Print
- Out of Print 10 May 2014
- Publish Country US
- Imprint McGraw-Hill Companies
- Format Hardcover
- Pages 47
- Language English