by Janet Asimov
First published 1989
When robot Norby and his human pal Jeff join Admiral Yobo on a trip back to prehistoric times, they expect a routine family history expedition. But the past holds dangerous surprises. Facing vicious predators and unpredictable time anomalies, the trio must fight to survive and find their way home. In the face of this epic adventure, Norby and Jeff forge an unbreakable bond, discovering the true meaning of friendship.
Genres: science-fiction, friendship, adventure, time-travel
Vibes: suspenseful, thought-provoking, whimsical
Tropes: fish-out-of-water, found-family
Period: Prehistoric
100 pages · Library Binding · Walker & Co