In the fourth book in the series, 'Dolphin Discovery', Sue Trew tells the story of Dart the baby dolphin mammal and Rainbow the dolphinfish and compares the difference between the dolphin mammal and the dolphinfish.

Written and illustrated by Sue Trew, it is a charming story and teaching book for children approximately between the ages of 3 to 8. There are extra 'Discussion Facts' in the back for parents and teachers. 31 pages, soft laminated cover. Be sure to collect Mummy and baby Dart and Rainbow the dolphinfish that go with this book. Also the other books in the series!