Adam Guillain & Charlotte Guillain 
Reading Planet — Save the Dolphin — Green: Comet Street Kids [EPUB ebook] 

Comet Street Kids reading books follow the adventures of Rav, Asha, Tess and Finn, four of the residents of Comet Street. There are 72 exciting stories in the series that children won’t be able to put down. When they see a rainbow at the wildlife park, Tess and Asha find themselves whirled away to the Amazon rainforest! They’re really excited, until they see an Amazon River Dophin stuck on the ground. Can they get the dolphin back to the river? Reading age: 5-6 years