The Famous Five: Five Go to Billycock Hill is the twentieth book in Enid Blyton's Famous Five series. In this thrilling adventure, Julian, Dick, Anne, George (Georgina), and their dog Timmy are off on a new holiday adventure to the countryside, where they discover the mysterious Billycock Hill. The children soon find out that strange things are happening in the area, including secretive activities and unexplained events. Intrigued by the mystery, the Famous Five set out to investigate. As they explore the hill and its surroundings, they uncover hidden clues, solve riddles, and face unexpected danger, all while working together as a team. With plenty of adventure, suspense, and the timeless friendship between the children and Timmy, this story keeps readers on the edge of their seats.