"King of the Castle" is an exciting adventure from the author George Manville Fenn. The main character of the book, a young boy named Leo, goes in search of adventure in an ancient castle. However, what begins as an exciting excursion quickly turns into a dangerous situation when Leo finds himself in the middle of mysterious intrigues. For the boy, this castle turns out to have many more secrets than he could have imagined. Will Leo be able to solve the mysteries of the castle, save his life and reveal the secret of the true King of this fortress? "King of the Castle" is an exciting book that teaches about friendship, courage and the fact that sometimes even in the most unlikely places can be hidden a real treasury of wisdom and adventure.