4 out of 5 🌟 Learning if fun! 'Secret Explorers' is a new series about a group of children from around the world with scientific expertise in various topics from space through dinosaurs to volcanos. Each volume brings a new mission to resolve with the help of the most knowledgeable explorers in a particular topic. 'The Lost Whales' book takes place in the South Pacific Ocean and the chosen explorers for that mission are Connor the marine expert, and Roshni the space explorer. As always, the role of sidekick will be revealed during the mission. 'The Secret Explorers' are packed with action and useful information about the given topic. At the end of each book, there are a few pages with iconographic and schemas to sum and explain all the scientific data used in the story, the glossary, and a quiz to test the knowledge. In 'The Lost Whales' readers get to know about... yes, whales but also the ocean's ecology and global warming that poses a real danger...