Why is everyone so afraid of the castle on the hill, and what dark secrets lurk inside its walls? When flashing lights are seen in a distant tower, Philip, Dinah, Lucy-Ann and Jack decide to investigate -- and discover a very sinister plot concealed within its hidden rooms and gloomy underground passages.
Enid Blyton, who died in 1968, is one of the most successful children's authors of all time. She wrote over seven hundred books, which have been translated into more than 40 languages and have sold more than 400 million copies around the world. Enid Blyton's stories of magic, adventure and friendship continue to enchant children the world over. Enid Blyton's beloved works include The Famous Five, Malory Towers, The Magic Faraway Tree and the Adventure series.