A hidden journal. A forgotten passage. A doorway to another world. Scotland, 1935.Charlie MacTavish is expecting another rainy, boring spring in the Highlands-until he finds an old journal hidden behind a wall of books. It once belonged to his grandfather... and it holds a secret: a lost passage under the ruins of Glenlith Castle, a world beyond their own, and a strange creature lurking near the loch.When Charlie and his best friend follow the clues and discover the hidden chamber, they're pulled into a mysterious realm filled with ancient magic, shifting time, and dangers they never imagined.To get back home, they'll have to outsmart powerful enemies, uncover the forgotten history of the castle, and face a family secret that could change everything.Packed with adventure, mystery, and magic, The Secret of the Castle is perfect for readers 10-14 who love epic quests, hidden worlds, and brave kids discovering their own power. Great for fans of The Chronicles of Narnia and The Spiderwick Chronicles.