Book excerpt: The novel tells the story of Akira Kumo, a retired couturier living in Paris, owner of the world's largest collection of books about clouds, and Virginie Latour, whom Kumo hires to help catalogue his library. While they work he tells her the story behind three figures in particular, all British, all obsessed by clouds: Luke Howard, a real-life Quaker who in 1802 wrote the first treatise classifying clouds (we still use it today); a painter named Carmichael, clearly based on John Constable, one of the most famous cloud painters of all time, and a fictional amateur meteorologist named Richard Abercrombie, who aspires to write the definitive book on cloud description, which would come to be known in cloud circles as the Abercrombie Protocol. Kumo sends Virginie Latour to London to buy the Protocol. By the end of the novel, we learn the Protocol's great secret; we understand what binds these men together; and and we learn that Kumo himself is a survivor of the Hiroshima blast, in whose cloud his family vanished.