Brillant, complete, fascinating, illustrated, words fail to describe the masterly study that Etienne Barillier just devoted to Steampunk and future-retro aesthetic. Based on the historical and literary origins of this strange literary object, the author evokes Jules Verne, Wells, as well as dime-novels and other popular publications. It then reviews all the current events of the retro-future art. In all arts: cosplay, music, jewelery, literature, film, animation ... In all countries: Europe, USA, Japan. Steamboy, Metropolis, Tezuka, Allan Moore, The Brigade Chimeric, Tim Powers, all are there.