When thirteen-year-old Bertram and three friends find themselves living in dinosaur bodies sixty-seven million years ago, they discover new ways to think about their lives.
- ISBN10 037580417X
- ISBN13 9780375804175
- Publish Date 5 October 1999 (first published 1 January 1999)
- Publish Status Remaindered
- Out of Print 20 October 2009
- Publish Country US
- Publisher Random House USA Inc
- Imprint Random House USA Children's Books
- Format Paperback
- Pages 261
- Language English