The Castle of Doubt is a 1907 novel written by John H. Whitson. The story follows the life of a young man named Richard Lancaster who inherits a mysterious castle from his uncle. The castle is located in a remote area and is shrouded in rumors and superstitions. Richard is fascinated by the castle and decides to explore it, despite warnings from the locals. As he delves deeper into the castle, he begins to uncover its dark secrets and learns about...