This book is perfect for those who love a good mystery and a thrilling adventure. Join Lucy-Ann, Jack, Dinah, and Philip as they explore a strange castle during their holiday. With a mysterious torch flashing at night and men secretly working inside the castle, the children find themselves in the midst of an exciting and suspenseful adventure. Packed with hidden secrets and unexpected twists, this book will keep you on the edge of your seat from beginning to end.

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What is the secret of the old castle on the hill, and why are the locals so afraid of it? 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.

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