Sammy the sea serpent: from the beginning

This first book in the Sammy series features Sammy?s mother Agnes and her twin brother Horace. The twin sea serpents are the first of their kind to evolve into creatures that can survive in the water and on the land. This is their story of survival and how Agnes meets Sammy?s father. Together the twins, along with Eric the dragon, manage to survive the Ice age and become a family with two children named Tommy and Sammy.