"The Mad King" by Edgar Rice Burroughs is a Ruritanian romance originally published in 1914-1915. Young American Barney Custer travels to the fictional European kingdom of Lutha, unaware he's the exact double of the newly escaped King Leopold. Mistaken for royalty, Barney becomes entangled in royal intrigue, falls for the king's promised bride Princess Emma, and must impersonate the monarch to save the throne from a scheming prince. Set against the outbreak of World War I, this adventure follows Barney through diplomatic danger, narrow escapes, and battles that will determine Lutha's fate. (This is an automatically generated summary.)