Book 1

Freeze-Up!

by Gillian Osband

Published 1 September 1982

Book 2

Rarest Egg

by Gillian Osband and Bobbie Spargo

Published 1 January 1982

Book 3

Double Cross

by Gillian Osband and Bobbie Spargo

Published 1 January 1982
A festival put on by the animals in Swamp Valley, where life has remained unchanged for fifty million years, is almost sabatoged by the evil Dr. Croc.

Book 4

In Trouble

by Gillian Osband and Bobbie Spargo

Published 1 September 1982