Ages 7-9. Chapter book. Learn all about life in the desert with this nature-themed installment of DK Books' new educational fiction series for children aged 7 to 9 years old. Meet the Secret Explorers - a band of brainiac kids from all around the world, here to take young readers on a series of fact-filled fictional adventures! Each with their own specialty, from outer space to dinosaurs, these young globetrotters will teach kids that learning can be fun, encouraging them to become experts in something they love. 128 pages