The Mystery of the Lake Monster

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 mysterious monster appears in the lake in the dead of night, can the girls uncover some clues and work out where it's come from? Don't miss the girls' first, second and fourth adventures - THE CASE OF THE STOLEN CROWN, THE SECRET OF THE SILK DRESS, THE HUNT FOR HIDDEN TREASURE.