Learn all about knights and castles in this spooky history-themed instalment 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. In this fun, fact-filled children's book, Kiki the engineering explorer and Gustavo the history expert get caught up in a spooky time travel mystery when a ghostly figure shows up at a medieval castle and terrifies the crowds!