Ten-year-old dinosaur twins Danny and Donna flee Dinoville to protect their pet pterodactyl from angry town citizens and find danger in spooky Lost Valley in the form of an angry Tyrannosaurus Rex.
- ISBN10 0671620916
- ISBN13 9780671620912
- Publish Date 1 January 1987
- Publish Status Out of Print
- Out of Print 9 November 2015
- Publish Country US
- Imprint Simon & Schuster
- Format Paperback (US Trade)
- Language English