Fu-manchu: the Trail of Fu-manchu -- Paperback / softback

Fu-Manchu is trapped, cornered in London and cut-off from his resources, including the elixir vitae that grants him eternal life. But under the Thames, the devil doctor practices the dark art of sorcery, and it will be up to Nayland Smith and Scotland yard to stop him. But Fu-Manchu may possess the key to victory, when he kidnaps Dr Petrie's wife.