Best friends Millie and Jess look just like twins! Millie is a princess and Jess is a maid so they have lots of fun swapping dresses and going on adventures around Peveril Palace. When a diamond crown is stolen before a royal birthday party, can the girls uncover some clues and work out where it's hidden?
What did Galileo help make? Who made milk safe to drink? Who were the first men on the moon? Where did Leonardo da Vinci come from? Which race is named after an ancient runner? Which emperor did Marco Polo meet in China? Who is known as the inventor of the telephone? What were the names of Christopher Columbuss ships? Which two brothers wrote the worlds favourite fairy tales? Who were the worlds very first hot air balloon passengers? And many more puzzles to solve!