Jeff Wells leaves the space academy with his mixed-up robot Norby and the two of them head back to Earth to help Jeff's brother unravel a mystery involving zapped robots and stolen computer parts.
- ISBN10 0441586074
- ISBN13 9780441586073
- Publish Date 1 November 1991 (first published 1 April 1989)
- Publish Status Out of Print
- Publisher Penguin Putnam Inc
- Imprint Ace Books
- Format Paperback (US Mass Market)
- Language English